Bumps font size of feature description (fixes regression)

Before:
![screen shot 2014-11-13 at 10 00 37 am](https://cloud.githubusercontent.com/assets/186715/5033616/221c638c-6b1c-11e4-846c-567f70bdc5fc.png)

After:
![screen shot 2014-11-13 at 10 00 46 am](https://cloud.githubusercontent.com/assets/186715/5033625/2a4228ee-6b1c-11e4-8252-ece7116b984e.png)