added `tomorrow-night` theme

Hi, Thorsten Lorenz

I added `tomorrow-night` theme used with iTerm2/Terminal's [Tomorrow Theme](https://github.com/ChrisKempson/Tomorrow-Theme), here the screenshot:

![2014-01-07 5 04 49](https://f.cloud.github.com/assets/157338/1857612/54535026-777b-11e3-985f-098b0e9722f6.png)

Thanks.