Added more guild features, fixed re-joining chat channels on relog

Changed guilds to be saved to a TreeMap instead of solely the SWGSet.
Fixed uses string
Added UnknownAbilityPacket (was sent for every new ability, doesnt seem
to do anything)
Lots of guild improvement/features added.
Merge branch 'master' of https://github.com/ProjectSWGCore/NGECore2