Java Edition 12w22a

12w22a is the eighth snapshot released for 1.3.1.

Additions

 * Added Jungle temples.
 * Added Tripwire Hooks.
 * Added Block of Emerald.
 * Added an "adventure" game mode (/gamemode 2).
 * The player cannot break or place any blocks.
 * The player can interact with any blocks, like doors and levers, and can buy from Villagers.
 * The player can still damage mobs.
 * Creative inventory
 * Added potions to the Creative inventory; found in "brewing" category.
 * Added delete item, armor and crafting to survival inventory when in creative.
 * Added Silverfish cobblestone and Stone Brick Egg blocks to the Creative inventory.

Changes
Debug Features:
 * Trading with Villagers has been updated
 * Villagers can now trade all sorts of items with you (for example, 1 emerald + 10 gravel -> 3 flint)
 * Some villagers will offer to enchant items (e.g. 3 emerald + 1 iron pickaxe -> 1 iron pickaxe with Fortune I)
 * Enchantment system has been rebalanced
 * The maximum enchantment level has been lowered from 50 to 30.
 * As a result enchantment tables now require only 15 bookcases around them to allow maximum level enchantments.
 * With a full enchantment table set with bookshelves, at the bottom of the 3 enchantments, it always shows you the highest number possible
 * Using level 30 enchantments, the player has a lot more luck; almost all items get at least 2 enchantments
 * Various actions will now reward the player with Experience Orbs, such as mining ores (except Gold Ore and Iron Ore), using furnaces, and getting achievements
 * Levels are now awarded linearly. It takes 17 experience to go up one level.
 * Shift-clicking now works with enchantment tables.
 * Smelting in a furnace with a lava bucket now leaves an empty bucket for the player to retrieve.
 * String can now be placed to create a tripwire between the hooks
 * Pausing now works again in singleplayer.
 * Some minor terrain changes.
 * Rain will slowly drip through leaves.
 * Extremely rarely, Nether Portals will spawn Zombie Pigmen.
 * When exposed to rain, cauldrons have a possibility of slowly filling with water.
 * Blocks seen in inventory are oriented to the right instead to the left.
 * Half-slabs can now be placed upside-down when pointing at the upper half of the side of a block. This does not work with stairs.
 * Pressing will reload the chunks.

Fixes
9 bugs fixed


 * In the redstone tab of the creative inventory, the redstone torch is now on instead of being off.
 * In the decoration tab of the creative inventory, the redstone torch has been removed.
 * Fixed the size of slimes which was sometimes wrong in the previous snapshot.
 * Fully charged arrows now show their particle effect again.
 * Arrows are now stuck at the correct position in the block they hit.
 * The language English (US) is available again.
 * Fixed Enderman often not shaking and opening their jaws when looked at.
 * Fixed repeaters sometimes being stuck when loading the chunks they are in.
 * The Search tab does not automatically open up unless the player presses their chat key, allowing the inventory to be closed with the normal inventory key again.