restyle the search bar to use bootstrap styling on the select and a larger search box

Fixes #979 

![screen shot 2014-11-11 at 12 02 47 pm](https://cloud.githubusercontent.com/assets/111218/4999889/fab81ad4-699a-11e4-8ce1-b204048f9453.png)
![screen shot 2014-11-11 at 12 02 53 pm](https://cloud.githubusercontent.com/assets/111218/4999890/fac923d8-699a-11e4-8c35-68d22671d0fe.png)