Update stylesheet to fix misaligned button titles

I updated the stylesheet to fix the weird spacing on the button labels for your github page. This changes from this:
![image](https://cloud.githubusercontent.com/assets/1237498/2558434/95cc266a-b748-11e3-9de7-4c164e44684b.png)

To this:
![image](https://cloud.githubusercontent.com/assets/1237498/2558435/a6854f0e-b748-11e3-9231-18730343ab24.png)