Update the appearance of buttons

![screen shot 2014-05-13 at 11 31 28 am](https://cloud.githubusercontent.com/assets/4962198/2962057/f1e8e1b6-dacc-11e3-8413-13775b8f8c13.png)
![screen shot 2014-05-13 at 11 31 34 am](https://cloud.githubusercontent.com/assets/4962198/2962058/f1e95ad8-dacc-11e3-8451-6ffd20a1fff4.png)

reviewers: @p-march @spostman