Add similar padding to front page between post info and post content

Before:
![capture d ecran de 2014-10-30 11 28 28](https://cloud.githubusercontent.com/assets/329969/4841955/29c75526-6020-11e4-9896-43c29fb29e08.png)

After:
![capture d ecran de 2014-10-30 11 32 39](https://cloud.githubusercontent.com/assets/329969/4841957/2f978f2a-6020-11e4-80b5-2502aec071a1.png)