Optimize Hoppers

- Lots of itemstack cloning removed. Only clone if the item is actually moved
- Return true when a plugin cancels inventory move item event instead of false, as false causes pulls to cycle through all items.
  However, pushes do not exhibit the same behavior, so this is not something plugins could of been relying on.
- Add option (Default on) to cooldown hoppers when they fail to move an item due to full inventory
- Skip subsequent InventoryMoveItemEvents if a plugin does not use the item after first event fire for an iteration

Spigot-Server-Patches/Entity-Tracking-Improvements.patch

@@ -7,7 +7,7 @@ If any part of a Vehicle/Passenger relationship is visible to a player,
 send all passenger/vehicles to the player in the chain.
 
 diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
-index 06857c48..ef096ef6 100644
+index 06857c483..ef096ef65 100644
 --- a/src/main/java/net/minecraft/server/Entity.java
 +++ b/src/main/java/net/minecraft/server/Entity.java
 @@ -0,0 +0,0 @@ public abstract class Entity implements ICommandListener {
@@ -19,7 +19,7 @@ index 06857c48..ef096ef6 100644
          if (bukkitEntity == null) {
              bukkitEntity = CraftEntity.getEntity(world.getServer(), this);
 diff --git a/src/main/java/net/minecraft/server/EntityTrackerEntry.java b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
-index 759dacba..efc4c79a 100644
+index 759dacba7..efc4c79ab 100644
 --- a/src/main/java/net/minecraft/server/EntityTrackerEntry.java
 +++ b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
 @@ -0,0 +0,0 @@ public class EntityTrackerEntry {