Upgrades windshaft to 0.51.0

NEWS.md

@@ -4,6 +4,9 @@
 
 Released 2015-mm-dd
 
+Announcements:
+ - Upgrades windshaft to [0.51.0](https://github.com/CartoDB/Windshaft/releases/tag/0.51.0)
+
 New features:
  - Make http and https globalAgent options configurable
    * If config is not provided it configures them with default values

npm-shrinkwrap.json

@@ -483,9 +483,9 @@
       "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.6.0.tgz"
     },
     "windshaft": {
-      "version": "0.50.0",
-      "from": "windshaft@0.50.0",
-      "resolved": "https://registry.npmjs.org/windshaft/-/windshaft-0.50.0.tgz",
+      "version": "0.51.0",
+      "from": "windshaft@0.51.0",
+      "resolved": "https://registry.npmjs.org/windshaft/-/windshaft-0.51.0.tgz",
       "dependencies": {
         "chronograph": {
           "version": "0.1.0",

package.json

@@ -24,7 +24,7 @@
     "dependencies": {
         "underscore"  : "~1.6.0",
         "dot": "~1.0.2",
-        "windshaft": "0.50.0",
+        "windshaft": "0.51.0",
         "step": "~0.0.5",
         "queue-async": "~1.0.7",
         "request": "~2.9.203",