UI refactoring

Improved the layout of summary boxes and moved configs to ownership.css
Also added a stub for the future UserFormatter extensions.

![ownership_ui_refactoring](https://cloud.githubusercontent.com/assets/3000480/3870290/e05abd4e-20c6-11e4-9bac-02cfce4aa546.png)

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>