Add ability assign Team to group of projects

![Teams link in group](http://puu.sh/2UuDj.png)

![Settings page in group](http://puu.sh/2UuE2.png)

![Assign team page](http://puu.sh/2UuEu.png)

![Teams list](http://puu.sh/2UuF7.png)

![Admin groups page](http://puu.sh/2UuGP.png)

![Admin group page](http://puu.sh/2UuHs.png)