title: NSInvalidUnarchiveOperationException with ContainerView
body: <p>Using a ContainerView with an embed seque
  I'm getting this:</p>
  
  <p><em>*</em> Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: 'Could not instantiate class named UIStoryboardEmbedSegueTemplate'</p>
  
  <p>My searches didn't provide a lot, so:
  Does this mean
  "Sorry, only on iOS6" ?</p>