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/Don-t-let-fishinghooks-use-portals.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Don't let fishinghooks use portals
 
 
 diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
-index 9ab89287..42da707a 100644
+index 9ab892876..42da707ae 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 {
@@ -18,7 +18,7 @@ index 9ab89287..42da707a 100644
      public int dimension;
      protected BlockPosition an;
 diff --git a/src/main/java/net/minecraft/server/EntityFishingHook.java b/src/main/java/net/minecraft/server/EntityFishingHook.java
-index 339d1f1b..7f011aef 100644
+index 339d1f1b1..7f011aef8 100644
 --- a/src/main/java/net/minecraft/server/EntityFishingHook.java
 +++ b/src/main/java/net/minecraft/server/EntityFishingHook.java
 @@ -0,0 +0,0 @@ public class EntityFishingHook extends Entity {