Update 1.6/build 30

The fifth Beta released related to Update 1.6. See changelog.

Fixes

 * Fixed mobs and players missing several limbs on some Android devices in previous 1.6 beta versions (MCPE-34385).
 * Fixed several crashes that occurred during gameplay.
 * Fixed a crash that occurred when joining a game and downloading Greek Mythology textures.
 * Quickly moving a stack of items in the inventory with a controller no longer leaves items behind (MCPE-34694).