Undid something because of an inconsistency
Added ItemStack model
Merge branch 'develop' into feature/inventory
Merge branch 'feature/inventory' of github.com:MultiverseMiner/multiverseminer into feature/inventory
Baseline design for inventory and warehouse objects
Added some chat functionality
Crafting tests in place

methods for inventory manipulation also in place.
Merge branch 'feature/inventory' of github.com:MultiverseMiner/multiverseminer into feature/inventory
Merge branch 'feature/inventory' into develop

other than some cruft from @jmeyer2k and the chat stuff, this is pretty solid.