groupMakerLeader.js
- serves as the command hook for the make leader command
GroupService.java
- now handles the GROUP_MAKE_LEADER intent
- added handleMakeLeader to take care of switching the leader to another character
- refactored sending invites out to sendInvite, one that allows the passage of the current groupID, and one that sets it to -1 for group creation
- handleGroupLeave also filled in
