Redesign profile page and port to Bootstrap

to do:
- [x] profile sidebar
- [x] mention facebox
- [x] /people/guid/contacts
- [x] adapt tests

![people view](https://cloud.githubusercontent.com/assets/3798614/4350071/9f7dcd6e-41d4-11e4-8ac8-316e5c1fd3b5.png)
Yep, it is set to a specific aspect. (In the [ContactsController](https://github.com/diaspora/diaspora/blob/develop/app/controllers/contacts_controller.rb#L54))