Moar sidebar stuff

Looks like this:

![screen shot 2014-08-25 at 4 26 20 pm](https://cloud.githubusercontent.com/assets/2289/4038152/b2c7cec2-2caf-11e4-97a4-00bf71ba4158.png)

Wow I like that comp! Hadn't seen that before. The only part I don't really like is the contributors. :)

I think it's good to emphasize contributors/maintainers, but not at the expense of more important things like the readme and stuff. I also think the displaying the user handle is useful.