adds in file list accessibility

Closes #110 

Adds tests for aria attributes and various accessibility components

![screen shot 2014-10-30 at 12 31 37 pm](https://cloud.githubusercontent.com/assets/1656824/4847390/700621fc-6052-11e4-9308-f5ba41c17077.png)
![screen shot 2014-10-30 at 12 31 27 pm](https://cloud.githubusercontent.com/assets/1656824/4847392/7007ce44-6052-11e4-9d50-b76d9071be4b.png)
![screen shot 2014-10-30 at 12 31 20 pm](https://cloud.githubusercontent.com/assets/1656824/4847391/70071f30-6052-11e4-87fd-ca898e057c06.png)