changes AdminBypass permission to enable new "bypass" command which toggles admin bypass mode on or off, defaults to off

added tracking for the SaveTask() and shutdown of it when the plugin is disabled

src/com/bukkit/mcteam/factions/Conf.java

@@ -87,6 +87,10 @@ public class Conf {
 		safeZoneNerfedCreatureTypes.add(CreatureType.SLIME);
 		safeZoneNerfedCreatureTypes.add(CreatureType.ZOMBIE);
 	}
+
+	// track players with admin access who have enabled "admin bypass" mode, and should therefore be able to build anywhere
+	// not worth saving between server restarts, I think
+	public static transient Set<String> adminBypassPlayers = Collections.synchronizedSet(new HashSet<String>());
 	
 	// -------------------------------------------- //
 	// Persistance