FishFace theme [#67]

https://https://f.cloud.github.com/assets/66143/1224622/ec9660d8-2750-11e3-9c96-cb7a5a69eada.png

I wanted to change the color based on git dirty, but every time the dirty status of the git repo I was in changed fish would freeze. Not sure why as the code to detect dirty status is the same as in the other themes, any ideas?