Dropper
-------
* This block is only available if digilines and/or mesecons are loaded.

Contains an inventory and drops an item on command. Also acts as a
digilines conductor. If the hopper mod is loaded, will take items from the
top and sides, and release them from the bottom. Pipeworks tubes can push
items into and pull items from the inventory.

Only the owner can dig or access the form of the locked version.

UI

Channel - digilines channel of dropper.
Top 16 slot inventory - storage of items to drop.
Bottom 32 slot inventory - player's inventory.

Mesecons
	Drops the next item when power is turned on.

Digilines messages

"drop"
	Drops the next item. No drop if dropper is empty.

"drop <slot>"
	Drops 1 item from the given slot (1 to 16). No drop if slot is empty.
	eg. "drop 7"

"drop <itemname>"
	Drops 1 item of the given name. No drop if dropper does not contain the
	item.
	eg. "drop default:stone"

When an item is dropped a digilines message is sent with the dropper's
channel. The message is a table with the following keys:
{
	action = "drop",
	name = "<itemname>", -- name of dropped item
	slot = <slot> -- slot number the item was taken from (1 to 16).
}
