Update of the method descriptions in the manual (CSS)

Before:
![method-description-before](https://f.cloud.github.com/assets/103362/1822348/64672412-715c-11e3-92d6-a9fd750702bc.png)

After:
![method-description-after](https://f.cloud.github.com/assets/103362/1822350/6c4be8c0-715c-11e3-862f-a97275a2016f.png)