Remove excess commas

Inconsistent commas removed for a cleaner and more professional look. No content has been changed. 

Before:
![screen shot 2014-09-18 at 8 52 29 pm](https://cloud.githubusercontent.com/assets/6635970/4330565/b65aad1a-3fb1-11e4-9d07-8e5557963cda.png)

After: 
![screen shot 2014-09-18 at 8 56 55 pm](https://cloud.githubusercontent.com/assets/6635970/4330570/d7a6c17a-3fb1-11e4-8994-b95306c42cf2.png)