Added method to fake a block change request for a player. Alas, my Justin Bieber playing sign can work again!

src/main/java/org/bukkit/entity/Player.java

@@ -141,6 +141,26 @@ public interface Player extends HumanEntity, CommandSender {
      * @return
      */
     public void playNote(Location loc, byte instrument, byte note);
+    
+    /**
+     * Send a block change. This fakes a block change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * 
+     * @param loc
+     * @param material
+     * @param data 
+     */
+    public void sendBlockChange(Location loc, Material material, byte data);
+    
+    /**
+     * Send a block change. This fakes a block change packet for a user at
+     * a certain location. This will not actually change the world in any way.
+     * 
+     * @param loc
+     * @param material
+     * @param data 
+     */
+    public void sendBlockChange(Location loc, int material, byte data);
 
     /**
      * Forces an update of the player's entire inventory.