Nuyube's Disposal Chests

In this update, disposal chest reliability issues were fixed. A list of notable points follows. - A new task runs every 10 seconds to discover new Disposal Chests that are in loaded chunks (fixes Disposal Chests not loading at world spawn or any always-loaded chunks) - Permissions have changed form disposalchests.use to disposalchests.create and disposalchests.destroy. - Disposal Chests now actually track their Z coordinate with a Z coordinate instead of a Y coordinate. - Disposal Chests now actually track a Y coordinate. - It is now impossible to withdraw the Warning item. - Dispensers cannot dispense the Warning item. - Hoppers cannot move the Warning item. - Containers do not drop the Warning item when destroyed. - Disposal Chests now uses mfnalex's Update Checker. - [Disposal] hoppers will no longer transfer items.