title: ember-cli fails on --environment=production (Uncaught Error: Could not find module)
body: <p>I am using ember-cli and have a problem with selecting the production environment.  Specifically, everything works when I run <code>ember serve --environment=development</code> and I get a blank page when I run <code>ember serve --environment=production</code>.  In the console, I see: </p>
  
  <ul>
  <li>Uncaught TypeError: undefined is not a function </li>
  <li>Uncaught Error: Could not find module simple-auth/authenticators/base</li>
  </ul>
  
  <p>All other things are equal, and all dependencies are up to date.  I'm a total noob so I don't even know where to begin on how to debug: is it ember? ember-cli? broccoli?  Any help would be appreciated.</p>