Use the new naming for active_model_adapter integration tests.

As the tests were written they worked just fine, but this may help
anyone that comes along and looks to the tests for inspiration.
Use defeatureify to strip debug statements from output.

* Adds `grunt-ember-defeatureify`
* Adds `dist` task, which now is roughly equivalent to previous `rake dist`.
* Removes `uglify` from `test` task (moved to `dist`).
Upgrade QUnit to v1.13.0

Start using a bower installed version of QUnit.
Cleanup.
- Ember.computed takes the DK as a first argument, no need to all property on it again
- misc formatting as I go.
Merge pull request #1701 from rjackson/cleanup-deprecation-warnings

Use the new naming for active_model_adapter integration tests.
Merge pull request #1702 from rjackson/use-defeatureify-to-strip-debug-statements

Use defeatureify to strip debug statements from output.
Use latest stable Ember.js

Note: the jQuery dependency needs to be specified explicitely since
Ember.js v1.3.1 does not support jQuery 2.1
Merge pull request #1697 from pangratz/upgrade_qunit

Upgrade QUnit to v1.13.0