Integrated Bootstrap in the User Interface...

 ... and made some minor improvements. 

![bildschirmfoto 2014-03-06 um 10 51 04](https://f.cloud.github.com/assets/5738978/2344069/e322685c-a519-11e3-80d8-8afd41f0d676.png)
Functionality remains the same
![bildschirmfoto 2014-03-06 um 10 51 17](https://f.cloud.github.com/assets/5738978/2344067/df901036-a519-11e3-960a-32bca092f753.png)