(Node) Use 'ws' module for WebSocket

Author: joseph-onsip

package.json

@@ -48,7 +48,8 @@
     "test": "grunt travis --verbose"
   },
   "dependencies": {
-    "pegjs": "0.8.0"
+    "pegjs": "0.8.0",
+    "ws": "^0.4.32"
   },
   "optionalDependencies": {
     "promiscuous": "^0.6.0"

src/environment.js

@@ -3,6 +3,7 @@ var extend = require('util')._extend;
 extend(exports, require('./environment_browser'));
 
 extend(exports, {
+  WebSocket: require('ws'),
   Promise: global.Promise || require('promiscuous'),
   console: require('console'),
   timers: require('timers')