Countdown

This adds in the counter requested by https://github.com/thieman/github-selfies/issues/37

There needs to be done some work around the styling of the numbers. I'll see if I can squeeze some time in later this week to tweak those.

I'm submitting this against master, since I'm not sure where you're keeping the release branches.


![selfie-2](http://i.imgur.com/TcIdpPs.gif)