Edit Groups Initial UI

Initial rough look, methods set up without php
Added a lot of functionality to Groups feature

Can now add arbitrary number of users to a group
Can now remove players from groups
Can now change who is the GM of a group
Can edit the group's name
You can call me the "Exterminator"

CAUSE THESE BUGS DON'T STAND A CHANCE
Fixed minor issues

Removed unused class
Fixed bug where user couldn't re-invite themselves to their own group
Some Basic UI tests

For EditGroupActivity and GroupCreateActivity.
bookkeeping
Need to pick a character when accepting invites
Resolving merge conflicts