Luggage

- added vibration support
-- luggage walking is silent, but opening it or it eating an item will trigger vibrations

- added support for the /kill command

-- luggage will drop all items when killed

-- a new sound plays too!

- removed the unused horn layer

- added some more unique behaviors to luggage

-- it now ignores tripwire

-- it can no longer push other entities, but can still be pushed around itself

-- it no longer plays the fall sound after falling

-- potions no longer work on it

- cleaned up my code a tiny bit, has no effect on gameplay :P

Please report any and all issues to the issue tracker, thank you!