Feature group details

Added a "Group Details" Page

Populates UI with details from the group. Bottom section correctly allows someone to update the Group Name/Description in the backend. 

To Do's:
-Set updating info section to only show up if user is an admin
-Maybe figure out a better way to display Admin names. Using Jquery to update UI seems lame...
not sure if I agree with this function.  Service is supposed to be our model, so having UI logic in here is no bueno.  Also, it seems like this code is really just to fetch the name of the group leader, which seems odd.  You should have already have that information in the group.admins, as each admin is already a user object that you can easily get the name of.  No need for another server side fetch.