Bukkit

Changes
    Added new file system for doors
    Added new file system for spawns
    Added ability to link spawns to doors
    Added revive ability
    Fixed spectators remaining invisible after a game
    Fixed spectators being able to manipulate players/zombies
    Fixed spectators able to gain points by hitting zombies
    Fixed spectators being able to drop/pickup items and gain expeirence
    Canned redstone activated spawns - laggy and unused
    Added ability to show where spawns/doors are when adding and removing them
    Fixed game creation glitches (recommended only 1 person create a game at a time!!)
    Changed how language file works internally and added more to language file
    Fixed inventory return issues when game ends
    Fixed games not starting when using /join
    Fixed waves with 0 zombies
    Fixed barricades not respawning correctly
    Fixed barricade repair sign giving money even when barricade is fully healed
    Fixed barricades not giving economy money, only points
    Fixed barricades fading away too fast
    Added new file system for barricades
    Added green wool indicator when adding/removing barricades

You WILL have to delete the entire ZombieSurvival data folder and older versions as the new file system for versions 3.1 and forward are NOT compatible with previous versions.