Update from upstream SpigotMC

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Bukkit-Patches/0019-Add-support-for-fetching-hidden-players.patch

@@ -0,0 +1,30 @@
+From d586570d9c65c5e4098a7e56093c5f9d1906448d Mon Sep 17 00:00:00 2001
+From: Tux <write@imaginarycode.com>
+Date: Sun, 9 Feb 2014 14:02:11 -0500
+Subject: [PATCH] Add support for fetching hidden players
+
+
+diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
+index 57e6eae..7ed0f6a 100644
+--- a/src/main/java/org/bukkit/entity/Player.java
++++ b/src/main/java/org/bukkit/entity/Player.java
+@@ -1096,6 +1096,16 @@ public interface Player extends HumanEntity, Conversable, CommandSender, Offline
+         {
+             throw new UnsupportedOperationException( "Not supported yet." );
+         }
++
++        /**
++         * Gets all players hidden with {@link hidePlayer(org.bukkit.entity.Player)}.
++         *
++         * @return a Set with all hidden players
++         */
++        public java.util.Set<Player> getHiddenPlayers()
++        {
++            throw new UnsupportedOperationException( "Not supported yet." );
++        }
+     }
+ 
+     Spigot spigot();
+-- 
+2.1.0
+