Bug fixes, collapsible mobile menu, filter icons

![screen shot 2013-06-04 at 2 11 38 am](https://f.cloud.github.com/assets/1004790/603879/c00921c2-ccdd-11e2-9449-89e3b3813f00.png)
![screen shot 2013-06-04 at 2 10 14 am](https://f.cloud.github.com/assets/1004790/603880/c00d30be-ccdd-11e2-97ee-4ba6c3a54f5e.png)