Fixed #WORLDGUARD-2289, FlagStateManager is not thread synced with the main thread.
Added workaround for #WORLDGUARD-2299, java.lang.IllegalArgumentException: Instant potions cannot be extended.
Fixed #WORLDGUARD-2296, Recent fix for dragon eggs in regions not working for left click.
Fixed #WORLDGUARD-2297, Beacons are not protected in regions.
Fixed typo where BEACON was COMMAND_BLOCK instead.
Implements WORLDGUARD-2315 Enderdragon portal blocking
Resolves WORLDGUARD-2352 Anvils usable despite the use flag
Resolves WORLDGUARD-2316 TNT still lethal when its damage is disabled
Build on latest Bukkit snapshot. Closes WORLDGUARD-2381

Fixes EntityChangeBlockEvent errors. Note that 1.4.5-R0.3-SNAPSHOT means build 2505+ and that there ARE 0.3 snapshots below 2505. Thus, this should be treated as temporary and changed on the next Bukkit Beta.
Null check for entity explosions without an entity.
Block snowballs in pvp regions again. Reverts 671fd58568
Attempt to fix item frame issues
Add support for blocking sub commands
Allow EnderPearls to damage the player who threw them in no-pvp areas