Voting page

Updated voting page UI
Added access token refreshing to the `addToPlaylist` function in `aux.js`
Added code for starting new voting rounds - round switching is handled automatically now

![screen shot 2014-12-28 at 2 48 16 pm](https://cloud.githubusercontent.com/assets/6354033/5566172/acd20ba6-8ee1-11e4-8ffb-92dbdb6a8fd8.png)