Bukkit

Fixed the console error when putting an unconnected player in the / inventory command. Adding a message when a player tries to modify an inventory when he does not have permission.

Added advancedspyinventory.inventory.clear permission which allows to clear the player's inventory.

Addition of the command /enderchest <Player> which gives access to the ender player's target chest and with a button which allows clearing.

Optimization of the plugin