Pocket Edition v0.9.0 alpha build 12

Alpha 0.9.0 build 12 (RC4) is the twelfth build version and fourth release candidate for Alpha 0.9.0.

Changes

 * Batched SetEntityMotion, EntityPos and HeadRotation packages together (down from 3000 packages per second to 150)

Fixes
13 bugs fixed


 * Crash with deleted chunks
 * A memory corruption
 * Issue on Android that didn't reuse graphics buffers correctly, caused weird triangles and holes
 * Crash when loading a world where the player was riding
 * Crash with exiting worlds while riding
 * Synchronization issues with multiple players in multiplayer
 * Entities was incorrectly added on the client
 * Multiple bugs with tile entities on clients
 * Spawn location on clients
 * Reseting spawn location would put players on roofs
 * Interact buttons now work in multiplayer
 * Placing rails was broken on clients (wrong direction)
 * Chests have been fixed for clients