Added support for ember-extension

 - _EAK_SEEN renamed to entries
 - Extend Ember.Resolver instead of DefaultResolver
 - Define ContainerDebugAdapter for the data adapter to use
Register container-debug-adapter and make it work with the data-adapter

 - Whitespace and formatting cleanup
 - catalogEntriesByType now returns strings instead of classes
 - Update commented ember-source gem to 1.5.0.beta.4
 - container-debug-adapter now returns strings instead of objects
Add support for Ember < 1.5
Commit dist after supporting entries-for-type