fix ember-cli-addon

- [ ] get @rwjblue to review
- [ ] ensure needed files are published
cool. Did you guys ever consider having bower packages as ember-addons as well?

For example if my bower.json had an `ember-addon` prop it should get treated included as an addon as well.

That would allow you to skip the blueprints entirely and just run `bower install emberfire --save`.
`app.import` would work fine without the blueprint because the bower package is already installed.