Updated Upstream (Bukkit/CraftBukkit/Spigot)

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

Bukkit Changes:
5b680f0b Note maximum objective score length in documentation

CraftBukkit Changes:
5932f8a7 Load default world spawn areas in consistent order
3a5dc78f Fix confusing migration message appearing on fresh server
516a408f Remove redundant CraftBukkit change for secondary world data
73a2c749 Process conversation input on the main thread.
100c3f07 Cap Objective Score Length
6e842759 Cross World Entity Teleportation
7deba1c6 Check for blank OfflinePlayer Names
f2746a5e Descriptive kick reasons instead of Nope!
b0212308 Cap Channel Registrations
a610dcd8 Identify CraftScheduler threads with useful names

Spigot Changes:
19c3c5a5 Rebuild patches

Spigot-Server-Patches/MC-Utils.patch

@@ -4,6 +4,26 @@ Date: Mon, 28 Mar 2016 20:55:47 -0400
 Subject: [PATCH] MC Utils
 
 
+diff --git a/src/main/java/com/destroystokyo/paper/util/SneakyThrow.java b/src/main/java/com/destroystokyo/paper/util/SneakyThrow.java
+new file mode 100644
+index 000000000..e58509675
+--- /dev/null
++++ b/src/main/java/com/destroystokyo/paper/util/SneakyThrow.java
+@@ -0,0 +0,0 @@
++package com.destroystokyo.paper.util;
++
++public class SneakyThrow {
++
++    public static void sneaky(Throwable exception) {
++        SneakyThrow.<RuntimeException>throwSneaky(exception);
++    }
++
++    @SuppressWarnings("unchecked")
++    private static <T extends Throwable> void throwSneaky(Throwable exception) throws T {
++        throw (T) exception;
++    }
++
++}
 diff --git a/src/main/java/net/minecraft/server/AttributeInstance.java b/src/main/java/net/minecraft/server/AttributeInstance.java
 index be179ba21..c53bc8230 100644
 --- a/src/main/java/net/minecraft/server/AttributeInstance.java
@@ -20,7 +40,7 @@ index be179ba21..c53bc8230 100644
  
      void b(UUID uuid);
 diff --git a/src/main/java/net/minecraft/server/BlockPosition.java b/src/main/java/net/minecraft/server/BlockPosition.java
-index 186fd5121..75a0f1386 100644
+index 330f5d0c1..37f9037a2 100644
 --- a/src/main/java/net/minecraft/server/BlockPosition.java
 +++ b/src/main/java/net/minecraft/server/BlockPosition.java
 @@ -0,0 +0,0 @@ public class BlockPosition extends BaseBlockPosition {
@@ -277,7 +297,7 @@ index b8abd6363..a07ee150c 100644
      // Paper end
  }
 diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
-index d55f52fe9..27705106b 100644
+index 53511f0cc..00e230037 100644
 --- a/src/main/java/net/minecraft/server/ItemStack.java
 +++ b/src/main/java/net/minecraft/server/ItemStack.java
 @@ -0,0 +0,0 @@ public final class ItemStack {
@@ -734,7 +754,7 @@ index 395215bbd..f2159bc2d 100644
          int j = 0;
          ChunkSection[] achunksection = chunk.getSections();
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index bb7ef0518..e35f17843 100644
+index d627f975b..08d1b859d 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -0,0 +0,0 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {