Access to signal R context. Add Constellation CDN for js lib. Promise on init context

Author: gclem

README.md

@@ -51,9 +51,14 @@ The config process is managed by the fantastic library [node-config]. You can ma
 ```js
     var constellation = require('constellation-nodejs');
 
+    //// Init and wait until initialization is completed
+    constellation.init().then(function() {
+        //// Init OK 
+    });
+
     //// Listen activity
     constellation.consumerHub.connection.stateChanged(function (change) {
-        if (change.newState === $.signalR.connectionState.connected) {
+        if (change.newState === constellation.$.signalR.connectionState.connected) {
             console.log("Je suis connecté");
         }
     });

index.js

@@ -11,4 +11,4 @@ var ConstellationContext = require('./lib/constellation.js');
 
 //// Checking config before init
 var context = new ConstellationContext();
-module.exports = context.check().init();
+module.exports = context.check();

lib/constellation.js

@@ -16,7 +16,7 @@ const window = jsdom.jsdom().defaultView;
 const cdn = {
     jquery : 'http://code.jquery.com/jquery-2.2.2.min.js',
     signalr : 'http://ajax.aspnetcdn.com/ajax/signalr/jquery.signalr-2.2.0.min.js',
-    constellation : 'https://gist.githubusercontent.com/gclem/148a32553d7c5d8dbc081eda65361177/raw/5ed718d829cf72d87dc3a9811c4a2ef40ff3bbbb/constellation-js-%s.js'
+    constellation : 'https://cdn.myconstellation.io/js/Constellation-%s.js'
 };
 
 var ConstellationContext = function ()
@@ -45,10 +45,8 @@ var ConstellationContext = function ()
     this.init = function() {
         var that = this;
         this.loadConfig();
-        this.loadDomContext()
+        return this.loadDomContext()
             .then(function() { that.createHub(that.url, that.accessKey, that.applicationName, that.sdkVersion); });
-
-        return that;
     };
 
     this.loadConfig = function() {
@@ -86,7 +84,7 @@ var ConstellationContext = function ()
     };
 
     this.createHub = function (url, accessKey, appName) {
-        var $ = window.$;
+        var $ = this.$ = window.$;
         this.consumerHub = this.consumerHub || $.signalR.createConstellationConsumer(url, accessKey, appName);
 
         return this.consumerHub;