Update GlobalGroups (removing old permissions) as Towny handles it's own
perms now.
Fix recursive loop when used on offline servers.
Merge pull request #265 from GunfighterJ/2.9

Adds essentials.mute.notify
Merge remote-tracking branch 'origin/groupmanager' into 2.9
Merge pull request #266 from GunfighterJ/2.9

Duplicate alias removed
Fix bug with empty motd
Adds vanilla syntax to /exp command