The Albatross is Massaging the Porpoise with Cheese

• Now works in engines [Thanks @mydea! #31]
• Remodal now appends modals to ENV.APP.rootElement and falls back to .ember-application. This should make testing easier, as modals will no longer appear outside of the testing context. [Thanks @esbanarango! #30]

This could probably be a minor release, but #30 could technically break tests if you were doing funny stuff to find a modal in the DOM during testing.

Here's an example of swapping tests to match the new setup: 4aa97c0