Java Edition 1.9-pre4

1.9-pre4 is the fourth and final pre-release for 1.9.

Changes

 * Made players invulnerable during dimension changes
 * Projectile scaling
 * Changed handling of  in entity selectors
 * Now based on the position of the entity and not on the center of the block anymore - meaning that  only selects entities at the exact same position.

Fixes

 * Listed in the blog post
 * Player entities ticking twice on servers
 * Fixed an issue that can affect sound positions