Icons

# Changes
 - More art! :art: Added special styling to first navigation item.
 - Added Autoprefixer to Sass build! Excellent!

/cc @weerd 

# Screenshot
![screen shot 2014-11-14 at 5 10 58 pm](https://cloud.githubusercontent.com/assets/583202/5054319/416e5528-6c21-11e4-952f-a95dd0797661.png)


I'm going to consider this to be progressive enhancement. Not worth complicating things imo.