Ember inspector hooks for detecting models with a module-based resolver.

Registers a `container-debug-adapter` to be used by the data adapter.
Initial fixes to allow extension-support to be AMD Resolver compatible
Ember.Resolver may as well just be the abstract resoler

- cleanup whitespace
- remove methods not needed in the base class
- make resolveHelper work again
container-debug-adapter now returns strings instead of classes

- Makes sure Ember tests pass
- Data adapter no longer relies on toString for model type names
- Miscellaneous fixes
Merge pull request #4451 from teddyzeenny/entries-by-type

WIP: Entries by type