Remove ember-cli-dependency-checker.

I would like to bring this back, but at the moment it is causing all of
our smoke tests to fail.
fix jshint
Merge pull request #2470 from rwjblue/remove-dependency-checker

Remove ember-cli-dependency-checker.
Bring back "ember-cli-dependency-checker"
Adding --pods support for adapters, serializers, and transforms
Don't use require() to read package.json
Merge pull request #2466 from trabus/model-pod-support

Add --pod support for adapters, serializers, and transforms
Merge pull request #2471 from joostdevries/dont-use-require-for-package-json

Bring back "ember-cli-dependency-checker"
Allow array of paths to the preprocessCss phase

- Ensure backwards compat for app.scss -> <app name>.css
Merge pull request #1888 from tstirrat/multiple-css-files

Allow array of paths to the preprocessCss phase
New version of leek
Merge pull request #2474 from twokul/updates-leek

New version of leek