Added command to leave arena
Added command to resave arena to file
Added arena timers
Start the arena timer when the arena is loaded
Removed permission required to join an arena
Lots of changes
Began implementing actions when arena state is switched
Added support to get the arena a player is in
Right click to join an arena
EXPLOSIONS!

No really, explosions. Roll back TNT/Creeper changes when the epicenter is in the arena
Minor Changes
Added support for current players in an arena