Add close button to drawer.

# Changes
 - Adds close button to drawer.

# Screenshot
![screen shot 2014-11-21 at 1 40 32 pm](https://cloud.githubusercontent.com/assets/583202/5147508/06b9ddfe-7184-11e4-858b-5fcb0d5aea4a.png)

/cc @weerd @angaither