countdown for the day formatter

I use this formatter every day to motivate myself to keep working. Seeing a countdown seems to work really well for extra motivation. (Only 30 minutes left!)

![screen shot 2014-04-14 at 10 55 27](https://cloud.githubusercontent.com/assets/122977/2693846/ef8d37f6-c3ba-11e3-937c-4a99a0b363a6.png)