Convert all CoffeeScript to Javascript. See:

http://meta.discourse.org/t/is-it-better-for-discourse-to-use-javascript-or-coffeescript/3153

spec/javascripts/message_bus_spec.js

@@ -0,0 +1,13 @@
+/*global waitsFor:true expect:true describe:true beforeEach:true it:true */
+(function() {
+
+
+  describe("Discourse.MessageBus", function() {
+    return describe("Long polling", function() {
+      var bus;
+      bus = Discourse.MessageBus;
+      return bus.start();
+    });
+  });
+
+}).call(this);