Use Bootstrap's "Label" element for more pleasant token output

Hi Zach,

I think using the "Label" element from Bootstrap would make the analyzer output more visually pleasant and flexible for further development -- such as colorization based on stemming etc.

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![visual-tokens](https://f.cloud.github.com/assets/4790/213976/2709afb6-83d9-11e2-97c4-3bec7ef2cf3c.png)