Add commercial list items

Add a new container for commercial list items (commonly used as navigation modules)

http://www.browserstack.com/screenshots/0f3d750b1c29651db3e0311bd186e201dea888d0

![screen shot 2014-10-16 at 13 10 05](https://cloud.githubusercontent.com/assets/867233/4662145/4e35c0ee-552d-11e4-9b65-77ef432fa630.png)