Group Management v1.0

This is the first iteration of the group management system.

It is currently only a little more flexible than the permissions system, but more to come!!!

Main Groups Screen
![screen shot 2014-12-11 at 01 14 11](https://cloud.githubusercontent.com/assets/1621438/5387516/2f7bf5ca-80d3-11e4-8c6e-83b8c73f8fb4.png)

Edit a group
![screen shot 2014-12-11 at 01 14 19](https://cloud.githubusercontent.com/assets/1621438/5387519/3c43ff8c-80d3-11e4-9fb5-e7e608d16029.png)

Add groups to users
![screen shot 2014-12-11 at 01 14 33](https://cloud.githubusercontent.com/assets/1621438/5387520/46d97616-80d3-11e4-9427-253bba19ae80.png)