new module dropdown

Adds a drop down menu for creating new modules. Only enabled for selected users using `toggle`.

![screenshot from 2013-11-04 12 26 56](https://f.cloud.github.com/assets/249606/1463939/be6172ee-453b-11e3-85fc-175a4f6322ce.png)
![screenshot from 2013-11-04 12 27 17](https://f.cloud.github.com/assets/249606/1463940/bea7d798-453b-11e3-9805-354d4f03dbb8.png)