Bunch of edits.

Added a DropPartyCommand interface. All commands must implement this interface to be able to be used in the CommandController.

Made the CommandController modular, all commands are added in a map. The Arrays.toString lower in the file is to show all the possibilities of a possible sub-commands.

Fixed CommandListChests. Using the variables instead of the toString() (Kinda foolish to do it :P)

Removed a useless variable in DropParty.