Keep the css coming

# Changes
 - More CSS. :art: 
 - Split main layout file into partials to make things easier to handle.

# Screenshot
![screen shot 2014-11-13 at 11 37 05 am](https://cloud.githubusercontent.com/assets/583202/5032183/dab677fe-6b29-11e4-973e-4a106600444f.png)

/cc @angaither @weerd 
That's some sharp "blading" you got here ;)