Pocket Edition v0.12.1 alpha build 4

Alpha 0.12.1 build 4 is the fourth build released for Alpha 0.12.1.

Changes

 * Quartz pillars can now be placed directionally.
 * Trying to connect to old versions of the game will now show an outdated screen.
 * Added recipes for golden apple and enchanted golden apple.
 * Added enchanted books to the creative inventory.
 * Stone cutter and crafting table screens will close if blocks are destroyed while having it open.
 * Improved controls

Fixes

 * Farmland is not destroyed when jumping on it in multiplayer
 * Pressing the inventory button did not get you back from multiple inventory screens.
 * Crafting recipes were wrong in multiplayer.
 * Partial blocks did not work properly in multiplayer.
 * Game crashed when entering the nether repeatedly.
 * When a controller is disconnected the player continues the last action, and other stuff.
 * Players cannot drink potions in creative mode.
 * Bane of arthropods does not deal additional damage to spiders.
 * Furnace displayed blocks that were not in your inventory.
 * Sky color is really dark. (Flat worlds)