stefanpenner/ember-cli — pull request #1370 by bcardarella (2014-07-13 15:35:50+00:00)
Title: Allow addons to be vendored outside of node modules

In package.json you can add paths for additional addons

```json
"ember-addon": {
"paths": [
"./lib/super-button"
]
}
```

The vendored library must conform to the addon spec, so it must have a
properly declared `package.json` file as well as its own loader.