add jshint devDependency and a make target for jshint

Makefile

@@ -6,7 +6,8 @@ params := $(connectionString)
 
 node-command := xargs -n 1 -I file node file $(params)
 
-.PHONY : test test-connection test-integration bench test-native build/default/binding.node
+.PHONY : test test-connection test-integration bench test-native \
+	build/default/binding.node jshint
 
 help:
 	@echo "make prepare-test-db [connectionString=pg://<your connection string>]"
@@ -50,3 +51,6 @@ prepare-test-db:
 	@echo "***Preparing the database for tests***"
 	@find script/create-test-tables.js  | $(node-command)
 
+jshint:
+	@echo "***Starting jshint***"
+	@./node_modules/.bin/jshint lib

package.json

@@ -12,7 +12,10 @@
   "dependencies" : {
     "generic-pool" : "2.0.2"
   },
-  "scripts" : { 
+  "devDependencies" : {
+    "jshint" : "*"
+  },
+  "scripts" : {
     "test" : "make test-all connectionString=pg://postgres@localhost:5432/postgres",
     "prepublish": "rm -r build || (exit 0)",
     "install" : "node-gyp rebuild || (exit 0)"