Dashboard page almost done. Updates to css throughout site

Hi Erika,

Some updates to the css. Cleaned up a few things with how the body and background of the page works on the landing page, and the tab navigation looks good and fits correctly now - it's changed on the landing page as well. The django compressor is working well too. Was fixed in the submodule. May be conflicts for this merge :-(

![Screen Shot 2013-03-12 at 6 44 15 AM](https://f.cloud.github.com/assets/283496/248506/994a6f3a-8b12-11e2-827e-6b7b576056ac.png)