Identity next

## Do not merge until the April 10th blog post

This updates the main logo and footer inline with the new identity

![Screen Shot 2013-04-07 at 2 35 51 PM](https://f.cloud.github.com/assets/72919/349513/6b3cdce0-9fcb-11e2-9b13-7e029ec4b8a0.png)
![Screen Shot 2013-04-07 at 2 35 45 PM](https://f.cloud.github.com/assets/72919/349514/6e1c2768-9fcb-11e2-9142-e407b0620322.png)

cc @jsncostello