Java Edition 13w16a

13w16a is the first snapshot released for 1.6.1.

Additions

 * Added horses
 * Ridable by right-clicking them, move with usual movement keys, maximum speed and jump height differ between horses
 * Have various amounts of maximum health, use wheat and carrots to heal them
 * Drop leather when killed
 * Can be bred using wheat – baby horses can be grown using apples, golden apples, wheat, and hay bales.
 * Players can make them jump by holding and pressing the space bar
 * They naturally step up over 1 block, which enables you to walk up hills
 * They can also use ladders, when steered towards them
 * Creation assisted by DrZhark (Creator of the Mo' Creatures mod)
 * There is a Undead and Skeleton version of the horse included in the code, although they require NBT editing to view ingame
 * Added donkeys
 * Like horses, but can carry chests on their back although no inventory is currently available
 * Mules can be obtained by breeding a Donkey and a Horse
 * Added horse armor
 * Exist in diamond, iron and gold variants
 * Crafted with six iron/gold/diamond, and a wool block
 * Added horse saddle
 * Stack to 32
 * Crafted with five leather and three iron ingots
 * Added horse spawn egg'''
 * When used, a different horse breed is created each time
 * Works like any other spawn egg
 * Added hay blocks
 * Can be placed in all orientations, just like wood
 * Added leads
 * Can be used to bind mobs to fences or lead them around
 * Right click mob first, then right-click fence or right-click the mob again to get the leash back
 * Added carpets
 * Carpets are made using 2 of your desired colors of wool in a horizontal line

Changes

 * Riding improvement
 * Add mob's health bar to the Heads-up display when riding on it (both pigs and horses).
 * When riding something, like a mob or a boat, dismounting is only possible using the Sneak key, by default
 * Improved Respiration enchant
 * Now also helps seeing underwater (this depends on the enchantment level, ranging from 1-3)
 * Changed the idea of mob difficulty
 * Regional difficulty: The longer you spend in one area, the harder it gets
 * Scales with difficulty – Items, enchants or AI improve with difficulty
 * Credits
 * Added Mo' Creatures developers to credits.txt
 * .minecraft directory structure is changed:
 * "assets" folder; stores resources such as language packs and sounds.
 * All music discs now use .ogg format instead of .mus format.
 * "library" folder; stores Java libraries such as LWJGL and jinput.jar.
 * "versions" folder; there are file "versions.json" (meta data) and folders that stores minecraft.jar for each versions (but its name is same as its version. e.g. for 13w16a, "versions/13w16a/13w16a.jar").

Fixes
2 bugs fixed
 * – SMP: Anvils change level for nothing when using languages other than English
 * – Endermen are rendered hostile if they take environmental damage