Block Dispenser

The Block Dispenser is a Redstone controlled device with a multitude of uses.
In the inventory of the Block Dispenser there is a highlighted slot that shows the current selected item. Given a full inventory, the selector will move over every slot 1 by one, changing after every redstone signal.

• The major usage of the Block Dispenser is its ability to break and place blocks in front of it.
  When it receives a signal it will place the currently selected block.
  When it loses that signal it will break the block in front of it.

• Silk touches Smooth Stone.

• Throw Dynamite from its inventory.

• Place Mining Charges that have gravity when facing downward.

• Companion Cubes.

• Take the wool off of Sheep.

• Milk a Cow with a bucket.

• Turn chickens into eggs???