fix generator

Ember.Application.injectControllers(stateManager) was renamed to Ember.Application.initialize(stateManager)

lib/generators/templates/app.js

@@ -9,7 +9,7 @@
 // <%= application_name.camelize %>.stateManager is useful for debugging,
 // but don't use it directly in application code.
 var stateManager = <%= application_name.camelize %>.stateManager = <%= application_name.camelize %>.StateManager.create();
-<%= application_name.camelize %>.injectControllers(stateManager);
+<%= application_name.camelize %>.initialize(stateManager);
 
 jQuery(function() {
   stateManager.send('ready');