Added global bourbon navigation

![refills-nav](https://cloud.githubusercontent.com/assets/223180/3164927/df35de6a-eb4e-11e3-8915-d7bcf92e00cb.gif)
![screen shot 2014-06-03 at 2 42 56 pm](https://cloud.githubusercontent.com/assets/223180/3164933/ea80d98c-eb4e-11e3-8bbe-13454424cfa1.png)