Improved vehicle management on user profile

I added some minor updates to the user profile, it is now easier and more clear how to add vehicles or remove them

Vehicle management:
- Add new vehicle asks for name
- Vehicle list with remove actions
- Alert before removing vehicles
- Vehicle list as grid
- Vehicle pre fetch record on detail page

![screenshot 2014-09-15 17 35 42](https://cloud.githubusercontent.com/assets/317648/4281069/a4db5ed8-3d39-11e4-979c-f8bf772a053a.png)