Use Node server by default

site/public/index.html

@@ -13,7 +13,7 @@
         /* The server can be anything that emits events in the format {event:"event name", data: {}}
         Look in js/app.js for StubEventsDispatcher for a mock event emitter.
         -----------------------------------------------------------*/
-        server = new StubEventsDispatcher('ws://localhost:8000');
+        server = new ServerEventsDispatcher('ws://localhost:8000');
 
     $(function(){
       for(widget_name in Widgets){