(WIP) porting frontend code to Bootstrap 3

Now with added unintentional iOS 7 feeling:

![screen shot 2013-10-04 at 07 05 26](https://f.cloud.github.com/assets/628602/1271364/c79c034e-2d1a-11e3-9fb6-975ef4538c4c.png)

# responsive

![screen shot 2013-10-04 at 19 35 58](https://f.cloud.github.com/assets/628602/1271428/859e032e-2d1b-11e3-8d77-056b39a13472.png)

# new buy view
![screen shot 2013-10-05 at 03 58 53](https://f.cloud.github.com/assets/628602/1273941/ce5d4f66-2d61-11e3-803d-57b38f32bc8d.png)
![screen shot 2013-10-05 at 03 59 08](https://f.cloud.github.com/assets/628602/1273942/d1f2361e-2d61-11e3-99e1-0a7ee465f997.png)


(work in progress, do not merge)