Crafting: nuke

This commit brings in a much-needed rewrite of crafting transaction handling.

The following classes have been removed:
- CraftingTransferMaterialAction
- CraftingTakeResultAction

The following classes have significant changes:
- CraftingTransaction
	- All API methods have been removed and are now handled in CraftItemEvent
- CraftItemEvent
	- added the following:
		- getInputs()
		- getOutputs()
		- getRepetitions() (tells how many times a recipe was crafted in this event)
- Recipe interface:
	- Removed getResult() (individual recipes may handle this differently)
- CraftingRecipe interface
	- removed the following:
		- matchItems()
		- getExtraResults()
		- getAllResults()
	- added the following
		- getResults()
		- getIngredientList() : Item[], which must return a 1D array of items that should be consumed (wildcards accepted).
		- matchesCraftingGrid(CraftingGrid)
- ShapedRecipe
	- constructor now accepts string[], Item[], Item[]
- ShapelessRecipe
	- constructor now accepts Item[], Item[]

src/pocketmine/Player.php

@@ -2302,11 +2302,17 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 				}
 			}
 
-			if($this->craftingTransaction->getPrimaryOutput() !== null){
-				//we get the actions for this in several packets, so we can't execute it until we get the result
+			if($packet->isFinalCraftingPart){
+				//we get the actions for this in several packets, so we need to wait until we have all the pieces before
+				//trying to execute it
+
+				$result = $this->craftingTransaction->execute();
+				if(!$result){
+					$this->server->getLogger()->debug("Failed to execute crafting transaction from " . $this->getName());
+				}
 
-				$this->craftingTransaction->execute();
 				$this->craftingTransaction = null;
+				return $result;
 			}
 
 			return true;