Fixing the width of the github btns on at the home

This is to fix the github fork and star buttons at the home page, with the old widht they wasn't showing the numbers.

![captura de tela 2014-08-26 as 00 52 18](https://cloud.githubusercontent.com/assets/2625083/4039842/7f48ea34-2cd4-11e4-80fc-8a1ea0535a33.png)