Add thrasher container with custom top level CSS class

For @sammorrisdesign 

![screen shot 2014-11-24 at 17 06 49](https://cloud.githubusercontent.com/assets/1001642/5169145/6105e97c-73fc-11e4-8c42-0d5a23dbc6b5.png)

Copying is OK for now, but you may need to promote to its own in the future as they become more advanced.