Remove member names from the policy page

This removes the member names from the policy comparison member list and compacts them into a tight grid. It also adds a tooltip to show the member's name on hover or focus.

![screen shot 2014-10-20 at 4 35 29 pm](https://cloud.githubusercontent.com/assets/1239550/4696826/f5ce95b6-581a-11e4-97a8-77fa01abbd4c.png)
![screen shot 2014-10-20 at 4 34 45 pm](https://cloud.githubusercontent.com/assets/1239550/4696828/fb0ee418-581a-11e4-94db-2f454f42b90c.png)
![Uploading Screen Shot 2014-10-20 at 4.34.24 PM.png . . .]()

closes #676