InvitationOnly

0.2:
+ Added UUID support
+ Added option to not broadcast failed logins
+ Changed name to InvitationOnly (no space)
+ Now automatically adds/removes members from the vanilla whitelist
+ Bug fixes
0.1:
+ First release.

+ probation-group is not yet implemented.
+ This update will change users.yml to replace usernames with UUID's. Make a backup if you're paranoid or think you may need to downgrade.