Rounded Avatars and new Detail Layout

New layout for "Detail" page and avatar images can be optionally be in a circle shape 

![cheap_sailgrade_improve](https://cloud.githubusercontent.com/assets/1160793/5029630/ff2e0b46-6b48-11e4-8f65-82615666ab68.png)
![schermata](https://cloud.githubusercontent.com/assets/1160793/5029631/ff377cf8-6b48-11e4-826e-9474da3bfc64.png)