Test this end-to-end

[toranb]

I'd like some way to verify the approved/working flows we support here. Because we only support inline hbs component hot reloading at the moment this might look something like ...

1. open app/ navigate to some route
2. assert the state of the component
3. modify some component.js file
4. hot reload fires
5. re-render occurs and the component is updated
6. assert the state was updated correctly

The same suite should run against:

• Dummy app
• A normal app
• An addon

[MiguelMadero]

We should automate this. At Zenefits we're using a framework to drive ember acceptance tests from python. I would like to do use something similar (ideally from node and not python), so we can have access to the start a watched build, then modify file and verify from an acceptance test the state of the DOM.

Right now it's getting pretty silly to manually test all of the variations supported after #17