added left and right padding to content

*Before*:
![bildschirmfoto 2014-02-18 um 09 12 36](https://f.cloud.github.com/assets/570608/2193038/d84ef4ec-9874-11e3-8777-3a1ecb81c0f4.png)

*After*:
![bildschirmfoto 2014-02-18 um 09 13 03](https://f.cloud.github.com/assets/570608/2193040/dfe283b8-9874-11e3-8fbb-ec75d45d6e45.png)