Redesign profile page and port to Bootstrap

to do:
- [x] profile sidebar
- [x] mention facebox
- [x] /people/guid/contacts
- [x] adapt tests

This PR fixes
* #5223 
* #4722
* #4658 and #4947 by removing profile pictures from the profile
* #5249 by removing `_profile_sidebar.html.haml`
* #4745

![people view](https://cloud.githubusercontent.com/assets/3798614/4350071/9f7dcd6e-41d4-11e4-8ac8-316e5c1fd3b5.png)
ok, I meant, like, a comment in the code ;)