(refactor) Filtered most common words out of word cloud feature.

Also changed color of word cloud text.

<h1>Before</h1>
![screen shot 2014-10-24 at 6 53 01 pm](https://cloud.githubusercontent.com/assets/8163408/4778410/d0512f56-5be9-11e4-9520-0836ecca6abb.png)

<h1>After</h1>
![screen shot 2014-10-24 at 6 52 24 pm](https://cloud.githubusercontent.com/assets/8163408/4778411/db89b87a-5be9-11e4-8faa-8b11008ebc96.png)