Add doomguy and Cloudability logo to Janky homepage

Migrate from the silly little robot guys, to EJ's [Doomguy](http://doomguy.herokuapp.com/). Also change from the Janky logo to a pretty Cloudability one, which actually looks pretty nice. 

It's cool when our internal tools can be at least half as pretty as our product is.

![Screenshot](http://aley.media.s3.amazonaws.com/Screen%20Shot%202013-10-05%20at%201.04.30%20AM.png)

P.S. I had a hard time deciding what the "building" and "pending" job guys should look like, feedback welcome. I don't think it's that important because the color AND text also reflect the status.