Make markdown looks like more GitHub

Before : 

![2014-06-28 1 07 03](https://cloud.githubusercontent.com/assets/748569/3433275/d4ad6dd4-007d-11e4-8ddc-8bc185ce24b0.png)

After : 

![2014-06-28 1 07 27](https://cloud.githubusercontent.com/assets/748569/3433278/dbeb8d2e-007d-11e4-8f97-e204fef6a41b.png)