GH Pages design cleanup

Removes a lot of the gradients, images, etc, and moves to a lighter color scheme. Also adds transitions to the bar :sparkles:

Current state:

![screen](https://cloud.githubusercontent.com/assets/211284/4261789/5f5738ee-3b7e-11e4-86ae-791a12852982.png)

Ah, yuck. Theres definitely no strong reason for keeping the meter element.