Some UI design changes for the terminal

![screen shot 2014-12-15 at 5 44 47 pm](https://cloud.githubusercontent.com/assets/3292874/5447393/2065f592-8482-11e4-9489-de5d21324fe1.png)

@ellisonbg said that @fperez and him had a long discussion where they decided we should declare only "monospace" when possible.