Broccolify all the things

I've setup a workflow with broccoli.

Run `make` to build from source in the `/dist` folder. It concatenates the files in `src` into  `dist/ember-cpm.js`.

To run tests in watch mode run `broccoli serve` and enter `http://localhost:4200`. It will watch for changes. Just write code, save an reload the browser.

You can also test against many browsers at a time with [Testem](https://github.com/airportyh/testem)

* Run `make test` will run agains all browsers installed in your machine.

Work for future iterations.

- [x] Build a minified file.
- [x] JSHint on tests.