Rework AEItemStack (#3091)

* Use itemstack as itemdef
* HIGH_TAG/LOW_TAG should be compared both directions
* Remove getTagCompound
* Make Itemlist implementation independent
* Cache item id for performance reasons
* Add preconditions to saveguard against external meddling
* Chache itemDamage
* Remove IAEStackSearchKey for now, rename getDisplayStack

src/main/java/appeng/container/implementations/ContainerUpgradeable.java

@@ -245,7 +245,7 @@ public class ContainerUpgradeable extends AEBaseContainer implements IOptionalSl
 			{
 				if( !currentItem.isEmpty() )
 				{
-					if( Platform.itemComparisons().isEqualItem( this.tbInventory.getItemStack(), currentItem ) )
+					if( ItemStack.areItemsEqual( this.tbInventory.getItemStack(), currentItem ) )
 					{
 						this.getPlayerInv().setInventorySlotContents( this.tbSlot, this.tbInventory.getItemStack() );
 					}