Bukkit

- Fixed dangerous pricing bug that occurred when transitioning to dynamic pricing. (Very important bugfix)
- Fixed bug involving splash potions not trading correctly with chest shops
- categories.yml will now be backed up like all other yml files.
- /iteminfo now shows item durability and the true item data value

The /importsql command is not finished.  Use it at your own risk.  The backups should be good for a future update, however.