Java Edition 13w11a

13w11a is the first snapshot released for Java Edition 1.5.1.

Items

 * Enchanted books
 * Can now be combined to raise their enchantment level or combine multiple enchantments on a single book.
 * When combining two enchantments for a higher level variation, the player requires two of the same level enchanted book.
 * They are still subject to the normal enchantment level limits.

General

 * Minecraft Realms
 * A few assorted changes.