Spigot
Empirecraft-API POM Changes
Water flow not trigger chunk loads

Make BlockFromToEvent default cancel if the flow would trigger a chunk load.
PlayerDeathEvent.getItemsToKeep

Exposes a mutable array on items a player should keep on death
Add a call helper to Event
EntityShootBowEvent consumeArrow API
ItemStack isSimiliar ability to skip durability check
Expose commandmap
Inventory Meta API
Entity Serialization

add method to spawn an entity at a location if its not in any world (invalid)
Remove Invalidated Metadata

On reload, metadata will be cleared
Add force to spawn reasons
Add API for vehicle exit event reason
Add ItemStack recipe API

Allows using custom items in Crafting Recipes
World.getNearbyEntities API

Adds much needed API for getting nearby entities based on a location and not an entity
Allow passing spawn reason
Add LivingEntity.getLoot()

Get the common loot this entity might drop on death.
Reduce thread synchronization in MetadataStoreBase

Use ConcurrentHashMap to allow thread-safe access methods and very
limited synchronized portions to allow much higher concurrency in
MetadataStore as well as far less locking, especially on reads
Use guava 17
Add Player.spigot().getFishingHook() API