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)
We have the same in `PeopleController#show` but it looks like it's not needed there either. I will remove it from both controllers.