Update from upstream SpigotMC

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Bukkit-Patches/0023-Add-Score.isScoreSet-Z-API.patch

@@ -0,0 +1,31 @@
+From 57096a321a825746d57c6086f6fe6e58d7c47b2b Mon Sep 17 00:00:00 2001
+From: md_5 <git@md-5.net>
+Date: Thu, 17 Apr 2014 19:35:13 +1000
+Subject: [PATCH] Add Score.isScoreSet()Z API.
+
+
+diff --git a/src/main/java/org/bukkit/scoreboard/Score.java b/src/main/java/org/bukkit/scoreboard/Score.java
+index 4c10346..2410cbd 100644
+--- a/src/main/java/org/bukkit/scoreboard/Score.java
++++ b/src/main/java/org/bukkit/scoreboard/Score.java
+@@ -51,6 +51,17 @@ public interface Score {
+      */
+     void setScore(int score) throws IllegalStateException;
+ 
++    // Spigot start
++    /**
++     * Shows if this score has been set at any point in time.
++     * 
++     * @return if this score has been set before
++     * @throws IllegalStateException if the associated objective has been
++     *     unregistered
++     */
++    boolean isScoreSet() throws IllegalStateException;
++    // Spigot end
++
+     /**
+      * Gets the scoreboard for the associated objective.
+      *
+-- 
+2.1.0
+