stefanpenner/ember-cli — pull request #259 by yaymukund (2014-04-04 16:59:57+00:00)
Title: Wrap the tree in a MergedTree so builder can call `clean()`

Right now, if you create a new app and try to `ember build`, it will fail. This fixes it. Might not be the best solution. Have 2% battery on a plane, so I'm submitting this as-is.