title: Embed ember-cli app into another one
body: <p>I want to share an application between to other <em>container</em> apps, both done in Ember. So the app have to communicate with the parent container and should be compiled just one time.</p>
  
  <p>What is the correct way to do this? Use an iframe and communicate with <code>App.__container__.lookup('controller:application')</code>?</p>