Updates link styles based on latest designs.

Normal:
![screen shot 2014-03-17 at 3 05 47 pm](https://f.cloud.github.com/assets/583202/2440392/319ad5a0-ae07-11e3-8e20-02594960f03c.png)

Hovered:
![screen shot 2014-03-17 at 3 05 55 pm](https://f.cloud.github.com/assets/583202/2440421/8191bd08-ae07-11e3-969f-047894cf2656.png)