Bukkit

Cleaned up for beta submission. includes:

• support for double chests
• hopper inventory rotation when an item is disallowed in target container
• support for multi-worlds (added world name to location key string)
• explicitly prevent trying to use it on Ender Chests
• fixed issue where furnaces only enforced their filter when turned off (when turned on, the plugin thought it was an entirely different block and didn't see the config data for it)
• stripped out all debug logging console statements
• added JavaDoc comments