Added support for intercepting items sent as equipment.

I didn't anticipate this feature in 2.0.0, so I had to make my own 
equipment inventory to fit into the InventoryView that I normally
pass along to the API clients.
Increment to 2.1.0-SNAPSHOT
Remove pointless "pack" key-value, and add some descriptions in config
Make it possible to specify the custom durability through the level.

In other words:
'283':
  other:
	enchantments:
	  NO_DURABILITY: 50