Java Edition 15w37a

15w37a is the twentieth snapshot released for 1.9.

Additions

 * New gamerule added to disable chunk generation for spectators.
 * New Superflat selection: The Void
 * It spawns the player in a stone platform floating in the sky, the rest of the world is empty.
 * The F3 screen shows the biome in a world using this preset is 'The Void'.

Changes

 * Hardcore mode now puts you in spectator mode instead of deleting your worlds.
 * Can use bows in the offhand now.
 * Shields now have a new crafting recipe and are patternless when crafted.
 * However they can be given a pattern by crafting it with a banner.
 * Rebalanced weapon and tools again.