diff --git a/NEWS.md b/NEWS.md
index f3810a04..8d056c37 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,6 +4,10 @@
 
 Released 2016-mm-dd
 
+New features:
+ - Allow to use `--config /path/to/config.js` to specify configuration file.
+   - Environment will be loaded from config file if `environment` key is present, otherwise it keeps current behaviour.
+
 Bug fixes:
  - Allow to use absolute paths for log files #570.
 
diff --git a/app.js b/app.js
index e5c489e1..10943bdc 100755
--- a/app.js
+++ b/app.js
@@ -5,15 +5,30 @@ var fs = require('fs');
 
 var _ = require('underscore');
 
-var ENVIRONMENT;
-if ( process.argv[2] ) {
-    ENVIRONMENT = process.argv[2];
-} else if ( process.env.NODE_ENV ) {
-    ENVIRONMENT = process.env.NODE_ENV;
-} else {
-    ENVIRONMENT = 'development';
+var argv = require('yargs')
+    .usage('Usage: $0 <environment> [options]')
+    .help('h')
+    .example(
+    '$0 production -c /etc/sql-api/config.js',
+    'start server in production environment with /etc/sql-api/config.js as config file'
+)
+    .alias('h', 'help')
+    .alias('c', 'config')
+    .nargs('c', 1)
+    .describe('c', 'Load configuration from path')
+    .argv;
+
+var environmentArg = argv._[0] || process.env.NODE_ENV || 'development';
+var configurationFile = path.resolve(argv.config || './config/environments/' + environmentArg + '.js');
+if (!fs.existsSync(configurationFile)) {
+    console.error('Configuration file "%s" does not exist', configurationFile);
+    process.exit(1);
 }
 
+global.environment = require(configurationFile);
+var ENVIRONMENT = argv._[0] || process.env.NODE_ENV || global.environment.environment;
+process.env.NODE_ENV = ENVIRONMENT;
+
 // jshint undef:false
 var log = console.log.bind(console);
 var logError = console.error.bind(console);
@@ -33,10 +48,6 @@ if (!availableEnvironments[ENVIRONMENT]){
 }
 
 process.env.NODE_ENV = ENVIRONMENT;
-
-// set environment specific variables
-global.environment = require('./config/environments/' + ENVIRONMENT);
-
 if (global.environment.uv_threadpool_size) {
     process.env.UV_THREADPOOL_SIZE = global.environment.uv_threadpool_size;
 }
@@ -99,6 +110,7 @@ var listener = server.listen(serverOptions.bind.port, serverOptions.bind.host, b
 var version = require("./package").version;
 
 listener.on('listening', function() {
+    log('Using configuration file "%s"', configurationFile);
     log(
         "Windshaft tileserver %s started on %s:%s PID=%d (%s)",
         version, serverOptions.bind.host, serverOptions.bind.port, process.pid, ENVIRONMENT
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 90bf1058..1d254015 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -146,7 +146,7 @@
                     },
                     "inherits": {
                       "version": "2.0.3",
-                      "from": "inherits@>=2.0.0 <3.0.0",
+                      "from": "inherits@>=2.0.1 <2.1.0",
                       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz"
                     },
                     "isarray": {
@@ -2963,116 +2963,121 @@
                       "from": "node-pre-gyp@>=0.6.28 <0.7.0",
                       "resolved": "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.6.28.tgz"
                     },
-                    "are-we-there-yet": {
-                      "version": "1.1.2",
-                      "from": "are-we-there-yet@>=1.1.2 <1.2.0",
-                      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.2.tgz"
-                    },
-                    "assert-plus": {
-                      "version": "0.2.0",
-                      "from": "assert-plus@>=0.2.0 <0.3.0",
-                      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz"
-                    },
-                    "ansi-regex": {
-                      "version": "2.0.0",
-                      "from": "ansi-regex@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.0.0.tgz"
-                    },
-                    "aws-sign2": {
-                      "version": "0.6.0",
-                      "from": "aws-sign2@>=0.6.0 <0.7.0",
-                      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz"
+                    "abbrev": {
+                      "version": "1.0.7",
+                      "from": "abbrev@>=1.0.0 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.7.tgz"
                     },
                     "ansi": {
                       "version": "0.3.1",
                       "from": "ansi@>=0.3.1 <0.4.0",
                       "resolved": "https://registry.npmjs.org/ansi/-/ansi-0.3.1.tgz"
                     },
-                    "abbrev": {
-                      "version": "1.0.7",
-                      "from": "abbrev@>=1.0.0 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.7.tgz"
-                    },
-                    "asn1": {
-                      "version": "0.2.3",
-                      "from": "asn1@>=0.2.3 <0.3.0",
-                      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz"
+                    "ansi-regex": {
+                      "version": "2.0.0",
+                      "from": "ansi-regex@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.0.0.tgz"
                     },
                     "ansi-styles": {
                       "version": "2.2.1",
                       "from": "ansi-styles@>=2.2.1 <3.0.0",
                       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz"
                     },
-                    "block-stream": {
-                      "version": "0.0.9",
-                      "from": "block-stream@*",
-                      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz"
+                    "are-we-there-yet": {
+                      "version": "1.1.2",
+                      "from": "are-we-there-yet@>=1.1.2 <1.2.0",
+                      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.2.tgz"
                     },
-                    "aws4": {
-                      "version": "1.4.1",
-                      "from": "aws4@>=1.2.1 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.4.1.tgz"
+                    "asn1": {
+                      "version": "0.2.3",
+                      "from": "asn1@>=0.2.3 <0.3.0",
+                      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz"
+                    },
+                    "assert-plus": {
+                      "version": "0.2.0",
+                      "from": "assert-plus@>=0.2.0 <0.3.0",
+                      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz"
                     },
                     "async": {
                       "version": "1.5.2",
                       "from": "async@>=1.5.2 <2.0.0",
                       "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz"
                     },
-                    "debug": {
-                      "version": "2.2.0",
-                      "from": "debug@>=2.2.0 <2.3.0",
-                      "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz"
+                    "aws-sign2": {
+                      "version": "0.6.0",
+                      "from": "aws-sign2@>=0.6.0 <0.7.0",
+                      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz"
                     },
-                    "brace-expansion": {
-                      "version": "1.1.4",
-                      "from": "brace-expansion@>=1.0.0 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.4.tgz"
+                    "aws4": {
+                      "version": "1.4.1",
+                      "from": "aws4@>=1.2.1 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.4.1.tgz"
                     },
                     "balanced-match": {
                       "version": "0.4.1",
                       "from": "balanced-match@>=0.4.1 <0.5.0",
                       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.4.1.tgz"
                     },
-                    "combined-stream": {
-                      "version": "1.0.5",
-                      "from": "combined-stream@>=1.0.5 <1.1.0",
-                      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.5.tgz"
-                    },
                     "boom": {
                       "version": "2.10.1",
                       "from": "boom@>=2.0.0 <3.0.0",
                       "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz"
                     },
+                    "block-stream": {
+                      "version": "0.0.9",
+                      "from": "block-stream@*",
+                      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz"
+                    },
+                    "brace-expansion": {
+                      "version": "1.1.4",
+                      "from": "brace-expansion@>=1.0.0 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.4.tgz"
+                    },
                     "chalk": {
                       "version": "1.1.3",
                       "from": "chalk@>=1.1.1 <2.0.0",
                       "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz"
                     },
+                    "caseless": {
+                      "version": "0.11.0",
+                      "from": "caseless@>=0.11.0 <0.12.0",
+                      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.11.0.tgz"
+                    },
                     "commander": {
                       "version": "2.9.0",
                       "from": "commander@>=2.9.0 <3.0.0",
                       "resolved": "https://registry.npmjs.org/commander/-/commander-2.9.0.tgz"
                     },
-                    "caseless": {
-                      "version": "0.11.0",
-                      "from": "caseless@>=0.11.0 <0.12.0",
-                      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.11.0.tgz"
+                    "combined-stream": {
+                      "version": "1.0.5",
+                      "from": "combined-stream@>=1.0.5 <1.1.0",
+                      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.5.tgz"
+                    },
+                    "concat-map": {
+                      "version": "0.0.1",
+                      "from": "concat-map@0.0.1",
+                      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz"
                     },
                     "core-util-is": {
                       "version": "1.0.2",
                       "from": "core-util-is@>=1.0.0 <1.1.0",
                       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz"
                     },
+                    "cryptiles": {
+                      "version": "2.0.5",
+                      "from": "cryptiles@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/cryptiles/-/cryptiles-2.0.5.tgz"
+                    },
+                    "debug": {
+                      "version": "2.2.0",
+                      "from": "debug@>=2.2.0 <2.3.0",
+                      "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz"
+                    },
                     "deep-extend": {
                       "version": "0.4.1",
                       "from": "deep-extend@>=0.4.0 <0.5.0",
                       "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.4.1.tgz"
                     },
-                    "concat-map": {
-                      "version": "0.0.1",
-                      "from": "concat-map@0.0.1",
-                      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz"
-                    },
                     "delayed-stream": {
                       "version": "1.0.0",
                       "from": "delayed-stream@>=1.0.0 <1.1.0",
@@ -3083,110 +3088,120 @@
                       "from": "delegates@>=1.0.0 <2.0.0",
                       "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz"
                     },
-                    "extend": {
-                      "version": "3.0.0",
-                      "from": "extend@>=3.0.0 <3.1.0",
-                      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.0.tgz"
-                    },
-                    "fstream-ignore": {
-                      "version": "1.0.4",
-                      "from": "fstream-ignore@>=1.0.3 <1.1.0",
-                      "resolved": "https://registry.npmjs.org/fstream-ignore/-/fstream-ignore-1.0.4.tgz"
-                    },
                     "escape-string-regexp": {
                       "version": "1.0.5",
                       "from": "escape-string-regexp@>=1.0.2 <2.0.0",
                       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz"
                     },
-                    "cryptiles": {
-                      "version": "2.0.5",
-                      "from": "cryptiles@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/cryptiles/-/cryptiles-2.0.5.tgz"
-                    },
-                    "fstream": {
-                      "version": "1.0.9",
-                      "from": "fstream@>=1.0.2 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.9.tgz"
-                    },
-                    "extsprintf": {
-                      "version": "1.0.2",
-                      "from": "extsprintf@1.0.2",
-                      "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.0.2.tgz"
-                    },
-                    "form-data": {
-                      "version": "1.0.0-rc4",
-                      "from": "form-data@>=1.0.0-rc3 <1.1.0",
-                      "resolved": "https://registry.npmjs.org/form-data/-/form-data-1.0.0-rc4.tgz"
-                    },
-                    "has-unicode": {
-                      "version": "2.0.0",
-                      "from": "has-unicode@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.0.tgz"
-                    },
-                    "gauge": {
-                      "version": "1.2.7",
-                      "from": "gauge@>=1.2.5 <1.3.0",
-                      "resolved": "https://registry.npmjs.org/gauge/-/gauge-1.2.7.tgz"
-                    },
-                    "glob": {
-                      "version": "7.0.3",
-                      "from": "glob@>=7.0.0 <8.0.0",
-                      "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.3.tgz"
-                    },
-                    "generate-object-property": {
-                      "version": "1.2.0",
-                      "from": "generate-object-property@>=1.1.0 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/generate-object-property/-/generate-object-property-1.2.0.tgz"
-                    },
-                    "forever-agent": {
-                      "version": "0.6.1",
-                      "from": "forever-agent@>=0.6.1 <0.7.0",
-                      "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz"
+                    "extend": {
+                      "version": "3.0.0",
+                      "from": "extend@>=3.0.0 <3.1.0",
+                      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.0.tgz"
                     },
                     "ecc-jsbn": {
                       "version": "0.1.1",
                       "from": "ecc-jsbn@>=0.1.1 <0.2.0",
                       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz"
                     },
-                    "graceful-fs": {
-                      "version": "4.1.4",
-                      "from": "graceful-fs@>=4.1.2 <5.0.0",
-                      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.4.tgz"
+                    "extsprintf": {
+                      "version": "1.0.2",
+                      "from": "extsprintf@1.0.2",
+                      "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.0.2.tgz"
+                    },
+                    "forever-agent": {
+                      "version": "0.6.1",
+                      "from": "forever-agent@>=0.6.1 <0.7.0",
+                      "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz"
+                    },
+                    "fstream-ignore": {
+                      "version": "1.0.4",
+                      "from": "fstream-ignore@>=1.0.3 <1.1.0",
+                      "resolved": "https://registry.npmjs.org/fstream-ignore/-/fstream-ignore-1.0.4.tgz"
+                    },
+                    "form-data": {
+                      "version": "1.0.0-rc4",
+                      "from": "form-data@>=1.0.0-rc3 <1.1.0",
+                      "resolved": "https://registry.npmjs.org/form-data/-/form-data-1.0.0-rc4.tgz"
+                    },
+                    "fstream": {
+                      "version": "1.0.9",
+                      "from": "fstream@>=1.0.2 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.9.tgz"
+                    },
+                    "gauge": {
+                      "version": "1.2.7",
+                      "from": "gauge@>=1.2.5 <1.3.0",
+                      "resolved": "https://registry.npmjs.org/gauge/-/gauge-1.2.7.tgz"
                     },
                     "generate-function": {
                       "version": "2.0.0",
                       "from": "generate-function@>=2.0.0 <3.0.0",
                       "resolved": "https://registry.npmjs.org/generate-function/-/generate-function-2.0.0.tgz"
                     },
-                    "hoek": {
-                      "version": "2.16.3",
-                      "from": "hoek@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz"
+                    "generate-object-property": {
+                      "version": "1.2.0",
+                      "from": "generate-object-property@>=1.1.0 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/generate-object-property/-/generate-object-property-1.2.0.tgz"
+                    },
+                    "glob": {
+                      "version": "7.0.3",
+                      "from": "glob@>=7.0.0 <8.0.0",
+                      "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.3.tgz"
+                    },
+                    "graceful-fs": {
+                      "version": "4.1.4",
+                      "from": "graceful-fs@>=4.1.2 <5.0.0",
+                      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.4.tgz"
                     },
                     "graceful-readlink": {
                       "version": "1.0.1",
                       "from": "graceful-readlink@>=1.0.0",
                       "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz"
                     },
-                    "http-signature": {
-                      "version": "1.1.1",
-                      "from": "http-signature@>=1.1.0 <1.2.0",
-                      "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.1.1.tgz"
-                    },
-                    "is-typedarray": {
-                      "version": "1.0.0",
-                      "from": "is-typedarray@>=1.0.0 <1.1.0",
-                      "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz"
+                    "has-ansi": {
+                      "version": "2.0.0",
+                      "from": "has-ansi@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/has-ansi/-/has-ansi-2.0.0.tgz"
                     },
                     "har-validator": {
                       "version": "2.0.6",
                       "from": "har-validator@>=2.0.6 <2.1.0",
                       "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-2.0.6.tgz"
                     },
-                    "isstream": {
-                      "version": "0.1.2",
-                      "from": "isstream@>=0.1.2 <0.2.0",
-                      "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz"
+                    "has-unicode": {
+                      "version": "2.0.0",
+                      "from": "has-unicode@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.0.tgz"
+                    },
+                    "hawk": {
+                      "version": "3.1.3",
+                      "from": "hawk@>=3.1.3 <3.2.0",
+                      "resolved": "https://registry.npmjs.org/hawk/-/hawk-3.1.3.tgz"
+                    },
+                    "hoek": {
+                      "version": "2.16.3",
+                      "from": "hoek@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz"
+                    },
+                    "http-signature": {
+                      "version": "1.1.1",
+                      "from": "http-signature@>=1.1.0 <1.2.0",
+                      "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.1.1.tgz"
+                    },
+                    "inflight": {
+                      "version": "1.0.4",
+                      "from": "inflight@>=1.0.4 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.4.tgz"
+                    },
+                    "inherits": {
+                      "version": "2.0.1",
+                      "from": "inherits@>=2.0.1 <2.1.0",
+                      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
+                    },
+                    "ini": {
+                      "version": "1.3.4",
+                      "from": "ini@>=1.3.0 <1.4.0",
+                      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.4.tgz"
                     },
                     "is-my-json-valid": {
                       "version": "2.13.1",
@@ -3198,50 +3213,45 @@
                       "from": "is-property@>=1.0.0 <2.0.0",
                       "resolved": "https://registry.npmjs.org/is-property/-/is-property-1.0.2.tgz"
                     },
-                    "inherits": {
-                      "version": "2.0.1",
-                      "from": "inherits@>=2.0.1 <2.1.0",
-                      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
-                    },
-                    "json-stringify-safe": {
-                      "version": "5.0.1",
-                      "from": "json-stringify-safe@>=5.0.1 <5.1.0",
-                      "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz"
+                    "is-typedarray": {
+                      "version": "1.0.0",
+                      "from": "is-typedarray@>=1.0.0 <1.1.0",
+                      "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz"
                     },
                     "isarray": {
                       "version": "1.0.0",
                       "from": "isarray@>=1.0.0 <1.1.0",
                       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz"
                     },
-                    "json-schema": {
-                      "version": "0.2.2",
-                      "from": "json-schema@0.2.2",
-                      "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.2.tgz"
+                    "isstream": {
+                      "version": "0.1.2",
+                      "from": "isstream@>=0.1.2 <0.2.0",
+                      "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz"
                     },
-                    "hawk": {
-                      "version": "3.1.3",
-                      "from": "hawk@>=3.1.3 <3.2.0",
-                      "resolved": "https://registry.npmjs.org/hawk/-/hawk-3.1.3.tgz"
-                    },
-                    "lodash._basetostring": {
-                      "version": "4.12.0",
-                      "from": "lodash._basetostring@>=4.12.0 <4.13.0",
-                      "resolved": "https://registry.npmjs.org/lodash._basetostring/-/lodash._basetostring-4.12.0.tgz"
-                    },
-                    "has-ansi": {
-                      "version": "2.0.0",
-                      "from": "has-ansi@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/has-ansi/-/has-ansi-2.0.0.tgz"
+                    "jodid25519": {
+                      "version": "1.0.2",
+                      "from": "jodid25519@>=1.0.0 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/jodid25519/-/jodid25519-1.0.2.tgz"
                     },
                     "jsbn": {
                       "version": "0.1.0",
                       "from": "jsbn@>=0.1.0 <0.2.0",
                       "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.0.tgz"
                     },
-                    "lodash.padstart": {
-                      "version": "4.5.0",
-                      "from": "lodash.padstart@>=4.1.0 <5.0.0",
-                      "resolved": "https://registry.npmjs.org/lodash.padstart/-/lodash.padstart-4.5.0.tgz"
+                    "json-schema": {
+                      "version": "0.2.2",
+                      "from": "json-schema@0.2.2",
+                      "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.2.tgz"
+                    },
+                    "json-stringify-safe": {
+                      "version": "5.0.1",
+                      "from": "json-stringify-safe@>=5.0.1 <5.1.0",
+                      "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz"
+                    },
+                    "jsonpointer": {
+                      "version": "2.0.0",
+                      "from": "jsonpointer@2.0.0",
+                      "resolved": "https://registry.npmjs.org/jsonpointer/-/jsonpointer-2.0.0.tgz"
                     },
                     "jsprim": {
                       "version": "1.2.2",
@@ -3253,40 +3263,35 @@
                       "from": "lodash._baseslice@>=4.0.0 <4.1.0",
                       "resolved": "https://registry.npmjs.org/lodash._baseslice/-/lodash._baseslice-4.0.0.tgz"
                     },
-                    "jodid25519": {
-                      "version": "1.0.2",
-                      "from": "jodid25519@>=1.0.0 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/jodid25519/-/jodid25519-1.0.2.tgz"
+                    "lodash._basetostring": {
+                      "version": "4.12.0",
+                      "from": "lodash._basetostring@>=4.12.0 <4.13.0",
+                      "resolved": "https://registry.npmjs.org/lodash._basetostring/-/lodash._basetostring-4.12.0.tgz"
                     },
-                    "mime-db": {
-                      "version": "1.23.0",
-                      "from": "mime-db@>=1.23.0 <1.24.0",
-                      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.23.0.tgz"
+                    "lodash.pad": {
+                      "version": "4.4.0",
+                      "from": "lodash.pad@>=4.1.0 <5.0.0",
+                      "resolved": "https://registry.npmjs.org/lodash.pad/-/lodash.pad-4.4.0.tgz"
+                    },
+                    "lodash.padend": {
+                      "version": "4.5.0",
+                      "from": "lodash.padend@>=4.1.0 <5.0.0",
+                      "resolved": "https://registry.npmjs.org/lodash.padend/-/lodash.padend-4.5.0.tgz"
                     },
                     "lodash.tostring": {
                       "version": "4.1.3",
                       "from": "lodash.tostring@>=4.0.0 <5.0.0",
                       "resolved": "https://registry.npmjs.org/lodash.tostring/-/lodash.tostring-4.1.3.tgz"
                     },
-                    "inflight": {
-                      "version": "1.0.4",
-                      "from": "inflight@>=1.0.4 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.4.tgz"
+                    "lodash.padstart": {
+                      "version": "4.5.0",
+                      "from": "lodash.padstart@>=4.1.0 <5.0.0",
+                      "resolved": "https://registry.npmjs.org/lodash.padstart/-/lodash.padstart-4.5.0.tgz"
                     },
-                    "ms": {
-                      "version": "0.7.1",
-                      "from": "ms@0.7.1",
-                      "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz"
-                    },
-                    "jsonpointer": {
-                      "version": "2.0.0",
-                      "from": "jsonpointer@2.0.0",
-                      "resolved": "https://registry.npmjs.org/jsonpointer/-/jsonpointer-2.0.0.tgz"
-                    },
-                    "minimist": {
-                      "version": "0.0.8",
-                      "from": "minimist@0.0.8",
-                      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz"
+                    "mime-db": {
+                      "version": "1.23.0",
+                      "from": "mime-db@>=1.23.0 <1.24.0",
+                      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.23.0.tgz"
                     },
                     "mime-types": {
                       "version": "2.1.11",
@@ -3298,105 +3303,90 @@
                       "from": "minimatch@>=2.0.0 <3.0.0||>=3.0.0 <4.0.0",
                       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.0.tgz"
                     },
-                    "lodash.pad": {
-                      "version": "4.4.0",
-                      "from": "lodash.pad@>=4.1.0 <5.0.0",
-                      "resolved": "https://registry.npmjs.org/lodash.pad/-/lodash.pad-4.4.0.tgz"
-                    },
-                    "ini": {
-                      "version": "1.3.4",
-                      "from": "ini@>=1.3.0 <1.4.0",
-                      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.4.tgz"
-                    },
-                    "lodash.padend": {
-                      "version": "4.5.0",
-                      "from": "lodash.padend@>=4.1.0 <5.0.0",
-                      "resolved": "https://registry.npmjs.org/lodash.padend/-/lodash.padend-4.5.0.tgz"
+                    "minimist": {
+                      "version": "0.0.8",
+                      "from": "minimist@0.0.8",
+                      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz"
                     },
                     "mkdirp": {
                       "version": "0.5.1",
                       "from": "mkdirp@>=0.5.0 <0.6.0",
                       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz"
                     },
-                    "nopt": {
-                      "version": "3.0.6",
-                      "from": "nopt@>=3.0.1 <3.1.0",
-                      "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz"
+                    "ms": {
+                      "version": "0.7.1",
+                      "from": "ms@0.7.1",
+                      "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz"
                     },
                     "node-uuid": {
                       "version": "1.4.7",
                       "from": "node-uuid@>=1.4.7 <1.5.0",
                       "resolved": "https://registry.npmjs.org/node-uuid/-/node-uuid-1.4.7.tgz"
                     },
-                    "oauth-sign": {
-                      "version": "0.8.2",
-                      "from": "oauth-sign@>=0.8.1 <0.9.0",
-                      "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.8.2.tgz"
+                    "nopt": {
+                      "version": "3.0.6",
+                      "from": "nopt@>=3.0.1 <3.1.0",
+                      "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz"
                     },
                     "npmlog": {
                       "version": "2.0.3",
                       "from": "npmlog@>=2.0.0 <2.1.0",
                       "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-2.0.3.tgz"
                     },
-                    "pinkie-promise": {
-                      "version": "2.0.1",
-                      "from": "pinkie-promise@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz"
-                    },
-                    "qs": {
-                      "version": "6.1.0",
-                      "from": "qs@>=6.1.0 <6.2.0",
-                      "resolved": "https://registry.npmjs.org/qs/-/qs-6.1.0.tgz"
-                    },
                     "once": {
                       "version": "1.3.3",
                       "from": "once@>=1.3.0 <2.0.0",
                       "resolved": "https://registry.npmjs.org/once/-/once-1.3.3.tgz"
                     },
-                    "semver": {
-                      "version": "5.1.0",
-                      "from": "semver@>=5.1.0 <5.2.0",
-                      "resolved": "https://registry.npmjs.org/semver/-/semver-5.1.0.tgz"
-                    },
-                    "process-nextick-args": {
-                      "version": "1.0.7",
-                      "from": "process-nextick-args@>=1.0.6 <1.1.0",
-                      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz"
-                    },
-                    "request": {
-                      "version": "2.72.0",
-                      "from": "request@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/request/-/request-2.72.0.tgz"
-                    },
-                    "pinkie": {
-                      "version": "2.0.4",
-                      "from": "pinkie@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/pinkie/-/pinkie-2.0.4.tgz"
-                    },
-                    "rimraf": {
-                      "version": "2.5.2",
-                      "from": "rimraf@>=2.5.0 <2.6.0",
-                      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.5.2.tgz"
-                    },
                     "path-is-absolute": {
                       "version": "1.0.0",
                       "from": "path-is-absolute@>=1.0.0 <2.0.0",
                       "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.0.tgz"
                     },
+                    "oauth-sign": {
+                      "version": "0.8.2",
+                      "from": "oauth-sign@>=0.8.1 <0.9.0",
+                      "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.8.2.tgz"
+                    },
+                    "pinkie": {
+                      "version": "2.0.4",
+                      "from": "pinkie@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/pinkie/-/pinkie-2.0.4.tgz"
+                    },
+                    "pinkie-promise": {
+                      "version": "2.0.1",
+                      "from": "pinkie-promise@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz"
+                    },
+                    "process-nextick-args": {
+                      "version": "1.0.7",
+                      "from": "process-nextick-args@>=1.0.6 <1.1.0",
+                      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz"
+                    },
+                    "qs": {
+                      "version": "6.1.0",
+                      "from": "qs@>=6.1.0 <6.2.0",
+                      "resolved": "https://registry.npmjs.org/qs/-/qs-6.1.0.tgz"
+                    },
                     "readable-stream": {
                       "version": "2.1.2",
                       "from": "readable-stream@>=2.0.0 <3.0.0||>=1.1.13 <2.0.0",
                       "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.1.2.tgz"
                     },
-                    "strip-ansi": {
-                      "version": "3.0.1",
-                      "from": "strip-ansi@>=3.0.0 <4.0.0",
-                      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz"
+                    "request": {
+                      "version": "2.72.0",
+                      "from": "request@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/request/-/request-2.72.0.tgz"
                     },
-                    "stringstream": {
-                      "version": "0.0.5",
-                      "from": "stringstream@>=0.0.4 <0.1.0",
-                      "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz"
+                    "rimraf": {
+                      "version": "2.5.2",
+                      "from": "rimraf@>=2.5.0 <2.6.0",
+                      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.5.2.tgz"
+                    },
+                    "semver": {
+                      "version": "5.1.0",
+                      "from": "semver@>=5.1.0 <5.2.0",
+                      "resolved": "https://registry.npmjs.org/semver/-/semver-5.1.0.tgz"
                     },
                     "sntp": {
                       "version": "1.0.9",
@@ -3408,30 +3398,45 @@
                       "from": "string_decoder@>=0.10.0 <0.11.0",
                       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz"
                     },
-                    "supports-color": {
-                      "version": "2.0.0",
-                      "from": "supports-color@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz"
+                    "stringstream": {
+                      "version": "0.0.5",
+                      "from": "stringstream@>=0.0.4 <0.1.0",
+                      "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz"
+                    },
+                    "strip-ansi": {
+                      "version": "3.0.1",
+                      "from": "strip-ansi@>=3.0.0 <4.0.0",
+                      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz"
                     },
                     "strip-json-comments": {
                       "version": "1.0.4",
                       "from": "strip-json-comments@>=1.0.4 <1.1.0",
                       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-1.0.4.tgz"
                     },
+                    "supports-color": {
+                      "version": "2.0.0",
+                      "from": "supports-color@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz"
+                    },
                     "tar": {
                       "version": "2.2.1",
                       "from": "tar@>=2.2.0 <2.3.0",
                       "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz"
                     },
+                    "tough-cookie": {
+                      "version": "2.2.2",
+                      "from": "tough-cookie@>=2.2.0 <2.3.0",
+                      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.2.2.tgz"
+                    },
                     "tunnel-agent": {
                       "version": "0.4.3",
                       "from": "tunnel-agent@>=0.4.1 <0.5.0",
                       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.4.3.tgz"
                     },
-                    "tough-cookie": {
-                      "version": "2.2.2",
-                      "from": "tough-cookie@>=2.2.0 <2.3.0",
-                      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.2.2.tgz"
+                    "tweetnacl": {
+                      "version": "0.13.3",
+                      "from": "tweetnacl@>=0.13.0 <0.14.0",
+                      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.13.3.tgz"
                     },
                     "uid-number": {
                       "version": "0.0.6",
@@ -3443,6 +3448,11 @@
                       "from": "util-deprecate@>=1.0.1 <1.1.0",
                       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz"
                     },
+                    "verror": {
+                      "version": "1.3.6",
+                      "from": "verror@1.3.6",
+                      "resolved": "https://registry.npmjs.org/verror/-/verror-1.3.6.tgz"
+                    },
                     "wrappy": {
                       "version": "1.0.1",
                       "from": "wrappy@>=1.0.0 <2.0.0",
@@ -3453,15 +3463,17 @@
                       "from": "xtend@>=4.0.0 <5.0.0",
                       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz"
                     },
-                    "verror": {
-                      "version": "1.3.6",
-                      "from": "verror@1.3.6",
-                      "resolved": "https://registry.npmjs.org/verror/-/verror-1.3.6.tgz"
-                    },
-                    "tweetnacl": {
-                      "version": "0.13.3",
-                      "from": "tweetnacl@>=0.13.0 <0.14.0",
-                      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.13.3.tgz"
+                    "bl": {
+                      "version": "1.1.2",
+                      "from": "bl@>=1.1.2 <1.2.0",
+                      "resolved": "https://registry.npmjs.org/bl/-/bl-1.1.2.tgz",
+                      "dependencies": {
+                        "readable-stream": {
+                          "version": "2.0.6",
+                          "from": "readable-stream@>=2.0.5 <2.1.0",
+                          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz"
+                        }
+                      }
                     },
                     "dashdash": {
                       "version": "1.13.1",
@@ -3487,27 +3499,15 @@
                         }
                       }
                     },
-                    "tar-pack": {
-                      "version": "3.1.3",
-                      "from": "tar-pack@>=3.1.0 <3.2.0",
-                      "resolved": "https://registry.npmjs.org/tar-pack/-/tar-pack-3.1.3.tgz",
+                    "rc": {
+                      "version": "1.1.6",
+                      "from": "rc@>=1.1.0 <1.2.0",
+                      "resolved": "https://registry.npmjs.org/rc/-/rc-1.1.6.tgz",
                       "dependencies": {
-                        "readable-stream": {
-                          "version": "2.0.6",
-                          "from": "readable-stream@>=2.0.4 <2.1.0",
-                          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz"
-                        }
-                      }
-                    },
-                    "bl": {
-                      "version": "1.1.2",
-                      "from": "bl@>=1.1.2 <1.2.0",
-                      "resolved": "https://registry.npmjs.org/bl/-/bl-1.1.2.tgz",
-                      "dependencies": {
-                        "readable-stream": {
-                          "version": "2.0.6",
-                          "from": "readable-stream@>=2.0.5 <2.1.0",
-                          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz"
+                        "minimist": {
+                          "version": "1.2.0",
+                          "from": "minimist@>=1.2.0 <2.0.0",
+                          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz"
                         }
                       }
                     },
@@ -3523,15 +3523,15 @@
                         }
                       }
                     },
-                    "rc": {
-                      "version": "1.1.6",
-                      "from": "rc@>=1.1.0 <1.2.0",
-                      "resolved": "https://registry.npmjs.org/rc/-/rc-1.1.6.tgz",
+                    "tar-pack": {
+                      "version": "3.1.3",
+                      "from": "tar-pack@>=3.1.0 <3.2.0",
+                      "resolved": "https://registry.npmjs.org/tar-pack/-/tar-pack-3.1.3.tgz",
                       "dependencies": {
-                        "minimist": {
-                          "version": "1.2.0",
-                          "from": "minimist@>=1.2.0 <2.0.0",
-                          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz"
+                        "readable-stream": {
+                          "version": "2.0.6",
+                          "from": "readable-stream@>=2.0.4 <2.1.0",
+                          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz"
                         }
                       }
                     }
@@ -4041,6 +4041,336 @@
           "resolved": "https://registry.npmjs.org/torque.js/-/torque.js-2.11.4.tgz"
         }
       }
+    },
+    "yargs": {
+      "version": "5.0.0",
+      "from": "yargs@>=5.0.0 <6.0.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-5.0.0.tgz",
+      "dependencies": {
+        "cliui": {
+          "version": "3.2.0",
+          "from": "cliui@>=3.2.0 <4.0.0",
+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz",
+          "dependencies": {
+            "strip-ansi": {
+              "version": "3.0.1",
+              "from": "strip-ansi@>=3.0.0 <4.0.0",
+              "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+              "dependencies": {
+                "ansi-regex": {
+                  "version": "2.0.0",
+                  "from": "ansi-regex@>=2.0.0 <3.0.0",
+                  "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.0.0.tgz"
+                }
+              }
+            },
+            "wrap-ansi": {
+              "version": "2.0.0",
+              "from": "wrap-ansi@>=2.0.0 <3.0.0",
+              "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.0.0.tgz"
+            }
+          }
+        },
+        "decamelize": {
+          "version": "1.2.0",
+          "from": "decamelize@>=1.1.1 <2.0.0",
+          "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz"
+        },
+        "get-caller-file": {
+          "version": "1.0.2",
+          "from": "get-caller-file@>=1.0.1 <2.0.0",
+          "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-1.0.2.tgz"
+        },
+        "lodash.assign": {
+          "version": "4.2.0",
+          "from": "lodash.assign@>=4.2.0 <5.0.0",
+          "resolved": "https://registry.npmjs.org/lodash.assign/-/lodash.assign-4.2.0.tgz"
+        },
+        "os-locale": {
+          "version": "1.4.0",
+          "from": "os-locale@>=1.4.0 <2.0.0",
+          "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
+          "dependencies": {
+            "lcid": {
+              "version": "1.0.0",
+              "from": "lcid@>=1.0.0 <2.0.0",
+              "resolved": "https://registry.npmjs.org/lcid/-/lcid-1.0.0.tgz",
+              "dependencies": {
+                "invert-kv": {
+                  "version": "1.0.0",
+                  "from": "invert-kv@>=1.0.0 <2.0.0",
+                  "resolved": "https://registry.npmjs.org/invert-kv/-/invert-kv-1.0.0.tgz"
+                }
+              }
+            }
+          }
+        },
+        "read-pkg-up": {
+          "version": "1.0.1",
+          "from": "read-pkg-up@>=1.0.1 <2.0.0",
+          "resolved": "https://registry.npmjs.org/read-pkg-up/-/read-pkg-up-1.0.1.tgz",
+          "dependencies": {
+            "find-up": {
+              "version": "1.1.2",
+              "from": "find-up@>=1.0.0 <2.0.0",
+              "resolved": "https://registry.npmjs.org/find-up/-/find-up-1.1.2.tgz",
+              "dependencies": {
+                "path-exists": {
+                  "version": "2.1.0",
+                  "from": "path-exists@>=2.0.0 <3.0.0",
+                  "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-2.1.0.tgz"
+                },
+                "pinkie-promise": {
+                  "version": "2.0.1",
+                  "from": "pinkie-promise@>=2.0.0 <3.0.0",
+                  "resolved": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz",
+                  "dependencies": {
+                    "pinkie": {
+                      "version": "2.0.4",
+                      "from": "pinkie@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/pinkie/-/pinkie-2.0.4.tgz"
+                    }
+                  }
+                }
+              }
+            },
+            "read-pkg": {
+              "version": "1.1.0",
+              "from": "read-pkg@>=1.0.0 <2.0.0",
+              "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-1.1.0.tgz",
+              "dependencies": {
+                "load-json-file": {
+                  "version": "1.1.0",
+                  "from": "load-json-file@>=1.0.0 <2.0.0",
+                  "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-1.1.0.tgz",
+                  "dependencies": {
+                    "graceful-fs": {
+                      "version": "4.1.6",
+                      "from": "graceful-fs@>=4.1.2 <5.0.0",
+                      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.6.tgz"
+                    },
+                    "parse-json": {
+                      "version": "2.2.0",
+                      "from": "parse-json@>=2.2.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-2.2.0.tgz",
+                      "dependencies": {
+                        "error-ex": {
+                          "version": "1.3.0",
+                          "from": "error-ex@>=1.2.0 <2.0.0",
+                          "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.0.tgz",
+                          "dependencies": {
+                            "is-arrayish": {
+                              "version": "0.2.1",
+                              "from": "is-arrayish@>=0.2.1 <0.3.0",
+                              "resolved": "https://registry.npmjs.org/is-arrayish/-/is-arrayish-0.2.1.tgz"
+                            }
+                          }
+                        }
+                      }
+                    },
+                    "pify": {
+                      "version": "2.3.0",
+                      "from": "pify@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz"
+                    },
+                    "pinkie-promise": {
+                      "version": "2.0.1",
+                      "from": "pinkie-promise@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz",
+                      "dependencies": {
+                        "pinkie": {
+                          "version": "2.0.4",
+                          "from": "pinkie@>=2.0.0 <3.0.0",
+                          "resolved": "https://registry.npmjs.org/pinkie/-/pinkie-2.0.4.tgz"
+                        }
+                      }
+                    },
+                    "strip-bom": {
+                      "version": "2.0.0",
+                      "from": "strip-bom@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-2.0.0.tgz",
+                      "dependencies": {
+                        "is-utf8": {
+                          "version": "0.2.1",
+                          "from": "is-utf8@>=0.2.0 <0.3.0",
+                          "resolved": "https://registry.npmjs.org/is-utf8/-/is-utf8-0.2.1.tgz"
+                        }
+                      }
+                    }
+                  }
+                },
+                "normalize-package-data": {
+                  "version": "2.3.5",
+                  "from": "normalize-package-data@>=2.3.2 <3.0.0",
+                  "resolved": "https://registry.npmjs.org/normalize-package-data/-/normalize-package-data-2.3.5.tgz",
+                  "dependencies": {
+                    "hosted-git-info": {
+                      "version": "2.1.5",
+                      "from": "hosted-git-info@>=2.1.4 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.1.5.tgz"
+                    },
+                    "is-builtin-module": {
+                      "version": "1.0.0",
+                      "from": "is-builtin-module@>=1.0.0 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/is-builtin-module/-/is-builtin-module-1.0.0.tgz",
+                      "dependencies": {
+                        "builtin-modules": {
+                          "version": "1.1.1",
+                          "from": "builtin-modules@>=1.0.0 <2.0.0",
+                          "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz"
+                        }
+                      }
+                    },
+                    "semver": {
+                      "version": "5.3.0",
+                      "from": "semver@>=2.0.0 <3.0.0||>=3.0.0 <4.0.0||>=4.0.0 <5.0.0||>=5.0.0 <6.0.0",
+                      "resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz"
+                    },
+                    "validate-npm-package-license": {
+                      "version": "3.0.1",
+                      "from": "validate-npm-package-license@>=3.0.1 <4.0.0",
+                      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz",
+                      "dependencies": {
+                        "spdx-correct": {
+                          "version": "1.0.2",
+                          "from": "spdx-correct@>=1.0.0 <1.1.0",
+                          "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-1.0.2.tgz",
+                          "dependencies": {
+                            "spdx-license-ids": {
+                              "version": "1.2.2",
+                              "from": "spdx-license-ids@>=1.0.2 <2.0.0",
+                              "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-1.2.2.tgz"
+                            }
+                          }
+                        },
+                        "spdx-expression-parse": {
+                          "version": "1.0.3",
+                          "from": "spdx-expression-parse@>=1.0.0 <1.1.0",
+                          "resolved": "https://registry.npmjs.org/spdx-expression-parse/-/spdx-expression-parse-1.0.3.tgz"
+                        }
+                      }
+                    }
+                  }
+                },
+                "path-type": {
+                  "version": "1.1.0",
+                  "from": "path-type@>=1.0.0 <2.0.0",
+                  "resolved": "https://registry.npmjs.org/path-type/-/path-type-1.1.0.tgz",
+                  "dependencies": {
+                    "graceful-fs": {
+                      "version": "4.1.6",
+                      "from": "graceful-fs@>=4.1.2 <5.0.0",
+                      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.6.tgz"
+                    },
+                    "pify": {
+                      "version": "2.3.0",
+                      "from": "pify@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz"
+                    },
+                    "pinkie-promise": {
+                      "version": "2.0.1",
+                      "from": "pinkie-promise@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz",
+                      "dependencies": {
+                        "pinkie": {
+                          "version": "2.0.4",
+                          "from": "pinkie@>=2.0.0 <3.0.0",
+                          "resolved": "https://registry.npmjs.org/pinkie/-/pinkie-2.0.4.tgz"
+                        }
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          }
+        },
+        "require-directory": {
+          "version": "2.1.1",
+          "from": "require-directory@>=2.1.1 <3.0.0",
+          "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz"
+        },
+        "require-main-filename": {
+          "version": "1.0.1",
+          "from": "require-main-filename@>=1.0.1 <2.0.0",
+          "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-1.0.1.tgz"
+        },
+        "set-blocking": {
+          "version": "2.0.0",
+          "from": "set-blocking@>=2.0.0 <3.0.0",
+          "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz"
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "from": "string-width@>=1.0.2 <2.0.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "dependencies": {
+            "code-point-at": {
+              "version": "1.0.0",
+              "from": "code-point-at@>=1.0.0 <2.0.0",
+              "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.0.0.tgz",
+              "dependencies": {
+                "number-is-nan": {
+                  "version": "1.0.0",
+                  "from": "number-is-nan@>=1.0.0 <2.0.0",
+                  "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.0.tgz"
+                }
+              }
+            },
+            "is-fullwidth-code-point": {
+              "version": "1.0.0",
+              "from": "is-fullwidth-code-point@>=1.0.0 <2.0.0",
+              "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
+              "dependencies": {
+                "number-is-nan": {
+                  "version": "1.0.0",
+                  "from": "number-is-nan@>=1.0.0 <2.0.0",
+                  "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.0.tgz"
+                }
+              }
+            },
+            "strip-ansi": {
+              "version": "3.0.1",
+              "from": "strip-ansi@>=3.0.0 <4.0.0",
+              "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+              "dependencies": {
+                "ansi-regex": {
+                  "version": "2.0.0",
+                  "from": "ansi-regex@>=2.0.0 <3.0.0",
+                  "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.0.0.tgz"
+                }
+              }
+            }
+          }
+        },
+        "which-module": {
+          "version": "1.0.0",
+          "from": "which-module@>=1.0.0 <2.0.0",
+          "resolved": "https://registry.npmjs.org/which-module/-/which-module-1.0.0.tgz"
+        },
+        "window-size": {
+          "version": "0.2.0",
+          "from": "window-size@>=0.2.0 <0.3.0",
+          "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.2.0.tgz"
+        },
+        "y18n": {
+          "version": "3.2.1",
+          "from": "y18n@>=3.2.1 <4.0.0",
+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz"
+        },
+        "yargs-parser": {
+          "version": "3.2.0",
+          "from": "yargs-parser@>=3.2.0 <4.0.0",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-3.2.0.tgz",
+          "dependencies": {
+            "camelcase": {
+              "version": "3.0.0",
+              "from": "camelcase@>=3.0.0 <4.0.0",
+              "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz"
+            }
+          }
+        }
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index dc192aee..27f10102 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,8 @@
     "step-profiler": "~0.3.0",
     "turbo-carto": "0.16.0",
     "underscore": "~1.6.0",
-    "windshaft": "2.5.0"
+    "windshaft": "2.5.0",
+    "yargs": "~5.0.0"
   },
   "devDependencies": {
     "istanbul": "~0.4.3",