Tools in autocrafting (#653)

src/main/java/codechicken/nei/recipe/stackinfo/DefaultStackStringifyHandler.java

@@ -1,5 +1,7 @@
 package codechicken.nei.recipe.stackinfo;
 
+import java.util.Optional;
+
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
@@ -55,4 +57,15 @@ public class DefaultStackStringifyHandler implements IStackStringifyHandler {
 
         return fluidStack;
     }
+
+    @Override
+    public Optional<ItemStack> getContainerItem(ItemStack stack) {
+
+        if (stack.getItem().hasContainerItem(stack)) {
+            return Optional.ofNullable(stack.getItem().getContainerItem(stack));
+        }
+
+        return null;
+    }
+
 }