Merge pull request #39 from kitsunde/patch-1

Only build commonjs.

Author: tomdale

ember-cli-build.js

@@ -2,6 +2,7 @@ var alchemist = require('broccoli-module-alchemist');
 
 module.exports = function() {
   return alchemist({
-    entry: 'fastboot-app-server.js'
+    entry: 'fastboot-app-server.js',
+    targets: ['cjs']
   });
 };