make PAC donor links a bit more noticeable

Feedback for the donor lists that are now also links to detail pages for PACs is that they are too subtle and won't easily be discovered. The styling left the links looking exactly like the normal list of donors (although underlines do appear when you mouse over the links). This restores the original color of the links, so it should be easier for people to guess that the list links to something interesting.

![alternatelinks](https://cloud.githubusercontent.com/assets/123509/4786813/6f3cfb60-5da0-11e4-8ce9-49ff19ee1fd0.gif)