Enhancements Nickname, and CMD Spy

These commits edit the nickname command and CMD Spy.
Nicknames are now to only be set with 1 parameter for a regular user, /nickname <nickname>. This prevents other users from nicknaming others and abusing it. Staff, will be able to remove nicknames from players, /nickname remove <player>. This will set their nick name to their username.
CMD Spy, now shows World Edit, commands in green if cmd spy is enabled. Thus increasing the visibility of the command.
I guess this has to be superadmin.setLoginMessage?