Style updates

Thought I'd give it a bit more of a "Zendesk" feel and upgrade to the latest bootstrap.

Not sure if I got everything, but it now looks like:

![screen shot 2013-08-01 at 4 40 36 pm](https://f.cloud.github.com/assets/562605/892105/1bb1b874-fa77-11e2-9152-b7c31b193b79.png)