Updated Upstream (CraftBukkit)

Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

CraftBukkit Changes:
17543ecf SPIGOT-5035: Error Using Virtual Merchant GUI
0fc6922b SPIGOT-5028: Villager#setVillagerExperience() doesn't work
bdbdbe44 SPIGOT-5024: Fox error - Unknown target reason

Spigot-API-Patches/0061-ensureServerConversions-API.patch

@@ -1,4 +1,4 @@
-From 005245b4911271b4f13791ff70746dc694f9b531 Mon Sep 17 00:00:00 2001
+From a1e4c9a771b5827464c1e538b2452ed09116bac1 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Wed, 4 May 2016 23:55:48 -0400
 Subject: [PATCH] ensureServerConversions API
@@ -7,7 +7,7 @@ This will take a Bukkit ItemStack and run it through any conversions a server pr
 to ensure it meets latest minecraft expectations.
 
 diff --git a/src/main/java/org/bukkit/inventory/ItemFactory.java b/src/main/java/org/bukkit/inventory/ItemFactory.java
-index cbcbe8c8..8e602cf5 100644
+index 4ff149fd9..bb3f7cdc1 100644
 --- a/src/main/java/org/bukkit/inventory/ItemFactory.java
 +++ b/src/main/java/org/bukkit/inventory/ItemFactory.java
 @@ -141,4 +141,17 @@ public interface ItemFactory {
@@ -29,7 +29,7 @@ index cbcbe8c8..8e602cf5 100644
 +    // Paper end
  }
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index bab86d80..44f3bec7 100644
+index bab86d804..44f3bec7d 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
 @@ -518,7 +518,7 @@ public class ItemStack implements Cloneable, ConfigurationSerializable {