Fixes after content design review

These changes address feedback from the Content team, who are both the content designers and end-users for this page.

Before:

![image](https://cloud.githubusercontent.com/assets/23801/4312134/792d0fe2-3eb6-11e4-9df1-f50434d9c11a.png)

After:

![image](https://cloud.githubusercontent.com/assets/23801/4312139/7ee4acc4-3eb6-11e4-9275-c2b053254081.png)