A 9 block high chicken shape

A trait for NPCs that are able to carry stuff around for you. Right click to
open their inventory and put stuff in it.

A magical dwarven axe which chops down a full tree trunk with one chop.

'Classic' mob-spawner, plus a varient with multiple levels. For best results
put it really high up in the sky, or above the open ocean. There should be
little to no other places nearby (like caves beneath you) where mobs could
spawn.

A futuristic base consisting of a big torus suspending by three pointy towers.

Implementation of private chests with shop capabilities

Start by naming a chest @username, only that user will be able to break the
chest or interact with its inventory.

You can add items in the chest that form a price list, e.g name the item "16
Golden Carrots : 3 Diamonds" and put it in the chest. Now when someone clicks
on a stack of golden carrots in the chest, it will exchage the golden carrots
and diamonds between the two inventories.

Current shortcomings:
- It's very easy to slightly (or deliberately) misspell the username, causing
  unbreakable chests
- Placing a chest left of a single chest will merge them and override the
  name, to be safe always put double chests
- Make it possible to use the display name of renamed items in the price list

Event handlers that hook up two buttons to beam the player from one to the
other.