Coffee script support is provided by `ember-cli-coffeescript` addon.

This addon provides both blueprints and preprocessor support via a
single `npm install --save-dev ember-cli-coffeescript` command.

https://github.com/kimroen/ember-cli-coffeescript
Fix `app.import`'s behavior in addons.

Also, allow `app.import` to specify the `destDir` for non-js/css assets.
Fix smoke test.
Merge pull request #1293 from rjackson/finish-1159

Fix up tests for #1159.
Merge pull request #1289 from rjackson/remove-coffeescript

Coffee script support is provided by `ember-cli-coffeescript` addon.
normalizeEntityName should be able to modify the entity name.