Added support for the "Code Folding"-Extension

Before
![image](https://cloud.githubusercontent.com/assets/1345792/3826464/2f0b05e2-1d62-11e4-8971-df174d91ea18.png)

After
![image](https://cloud.githubusercontent.com/assets/1345792/3826439/d876b776-1d61-11e4-86b2-ecbc7f48c56f.png)