Broccolify all the things

I've setup a workflow with broccoli.

Run `broccoli build dist` to build from source in the `/dist` folder.

* It concatenates the files in `src` into  `dist/ember-cpm.js`.
* Also generates other files needed for ci tests.

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 `testem ci` and specs will run agains all browsers installed in your machine.

Work for future iterations.

* Build a minified file.