Finished command subsystem
Introduced basic commands
Added LICENCE to commands
Added adventure ID
Implemented new interface
added attackcommand Implementation. loot and player death missing.
Added information to the open command
Added position structure
Finished open command
Introduced movement
Added go command
Merge origin/dev into dev
Added DropCommand
Finished all commands
Fixed inventory
Added ignore
Added isEmpty
Fully implement AttackCommand
Added item drops.
(Jan Kerkenhoff-2197164)
Prepared TextAdventure class
Removed private xml