Fixed factions tag in disabled worlds
Fixes NPE when a player is teleporting
Fixes the tags not updating properly after a Factions 2.0 events
Added an event to allow other plugins to change the resulting tag
Revert "Added an event to allow other plugins to change the resulting tag"

This reverts commit 8ed98189be7edc4948eae1ba4f03441e2e058795.
Added an event to allow other plugins to change the resulting tag