Bukkit

Changes:
+ Added /bg setmainspawn for main spawn location
+ Added /bg createarena <arenaname> for adding arena's
+ Added /bg setredspawn <arenaname> for adding red's spawnpoint
+ Added /bg setbluespawn <arenaname> for adding blue's spawnpoint
+ Added /bg join <arenaname> for joining games
+ Added /bg leave for leaving games
+ Added /bg done for marking your building as done