Added duel-start/end commands that will be executed by console once duel starts/ends.
Added Inventory-Saving feature. When request receiver accepts the duel, if this module is enabled and player has toggled this in duel GUI, both players items will be taken away and stored. Whenever duel ends we give them their items back. You can use this if you want to give players some kits once duel starts.This is disabled by default and you can enable this in modules (config.yml).
+Numerous updates and fixes that i don't remember. Updates were delayed because I wasn't sure if one of the update was stable or not.