Add Beacon block state for hopper events. Fixes BUKKIT-3932
Special case large chests for hopper events. Fixes BUKKIT-3916

Large chests work in a different fashion as they are a combination of
two other inventories. This causes their getOwner method to always return
null as their is no correct return. To compensate for this for the hopper
events we special case them to use their CraftBukkit counterpart that has
the information we need for the event.
Only call event when turning pressure plate on. Fixes BUKKIT-3881
Include anvil result in inventory size. Fixes BUKKIT-3741
Remove relocation
Upgrade maven