Feature/feedback

Sample screenshot. Same footer on the other two tab views (polling list, ballot list).

![ios simulator screen shot nov 19 2014 11 30 47 am](https://cloud.githubusercontent.com/assets/1818302/5109625/8872eb60-6fe0-11e4-855e-be5a797e13d2.png)

We've taken to removing the boilerplate that we don't use.