Split interesting votes into rebel votes and free votes

Note that this doesn't show free votes for members that have none, while the rebel votes section is shown for all members.

Suggestions to improve the copy of the little intro par could be good.

closes #901 

![screen shot 2014-10-28 at 3 01 38 pm](https://cloud.githubusercontent.com/assets/1239550/4803501/49339956-5e59-11e4-8821-dc7df6049cf3.png)
![screen shot 2014-10-28 at 3 01 25 pm](https://cloud.githubusercontent.com/assets/1239550/4803503/4cf360da-5e59-11e4-89b8-03f00829d4dd.png)
![screen shot 2014-10-28 at 3 01 56 pm](https://cloud.githubusercontent.com/assets/1239550/4803505/5465f968-5e59-11e4-9119-f19bdd6f2f01.png)
![screen shot 2014-10-28 at 3 02 16 pm](https://cloud.githubusercontent.com/assets/1239550/4803508/61dfc56a-5e59-11e4-8675-de73bce2e921.png)

line 13 seems sus too. We want to know if they have members who entered before the date the data starts.