Java Edition 15w51b

15w51b was released to fix two bugs as well as a crash in the AI and pathfinding code. This is also the final snapshot of 2015.

Changes

 * Silverfish
 * No longer enter into blocks if the game rule  is false.
 * NBT tags
 * Entity: ArmorStand
 * (integer): Original values have changed in nature
 * 1 << slot = disables all interaction
 * 1 << (slot + 8) = disables removing
 * 1 << (slot + 16) = disables placing