[Fix] Use Lists instead of illegal generic arrays in TriMap
[Fix] The mustBeEmpty OITGArenaCommand flag is now respected
Update signs when arenas are reopened and when the server shuts down
Remove player from arena on quit
"Player has fled" broadcast on removal is now optional
Add '/oitg kick <arena> <player/all>' command
Consolidate teleportation
Add '/oitg settings <arena> <setting> <value>' command
Implement arena round timer
Players are armed and set to survival mode when a round starts
Add '/forcestart <arena>' command
Add '/forcestop <arena> [delay]' command
Add projectile impact handling; complete mob combat handling
Refactor mob combat arena flag to reflect external name
Complete combat handler
No fighting in the lobby! Take it out back...
Add allowItemDrop and allowItemPlace attributes (persisted) to Arena
Implement handling of attributes added in previous commit
Handle respawning of players in arenas
Decrement arena timers every second (this is what makes it all tick!)