Webbapp bundle

Quite big refacto.

- Moved all Controller logic and views of the webapp from the RadioBundle to the WebAppBundle.
- Use Bower for js dependencies (build flow needs to be rewritten though).
- Soundcloud API did something weeeird (loading file://soundmanager2 instead of http://soundmanager2)
- Chaplin App refacto to work with new 0.11 version.