2.3-2.4.1

Add online time back as a leveling method
Add player and mob health tags
Add disabled worlds feature
Rewrite log handling
Add version command
Rewrite help command
Rewrite all timers to use safer threading
Remove all imports of Bukkit
Call XP gain event with /addxp
Fix weird space with /iname
Remove debug messages from /sit, along with warzone check
Add sitting check for /unride, possibility of crash
Fix bug that could unregister Player Listener if PVPGun wasnt found