Add group edit page

Looks just like the group page... but with text inside of it :)

![image](https://cloud.githubusercontent.com/assets/4072455/2702710/83f4c1f4-c43b-11e3-8e48-ad9fefc6ea19.png)

![image](https://cloud.githubusercontent.com/assets/4072455/2702714/95d2cbf0-c43b-11e3-9a27-3f98127f4214.png)