Added method to fake a block change request for a player.

src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -7,6 +7,7 @@ import net.minecraft.server.EntityPlayer;
 import net.minecraft.server.ItemInWorldManager;
 import net.minecraft.server.Packet200Statistic;
 import net.minecraft.server.Packet3Chat;
+import net.minecraft.server.Packet53BlockChange;
 import net.minecraft.server.Packet54PlayNoteBlock;
 import net.minecraft.server.Packet6SpawnPosition;
 import net.minecraft.server.ServerConfigurationManager;
@@ -147,6 +148,19 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
                 new Packet54PlayNoteBlock(loc.getBlockX(), loc.getBlockY(), loc.getBlockZ(), instrument, note));
     }
 
+    public void sendBlockChange(Location loc, Material material, byte data) {
+        sendBlockChange(loc, material.getId(), data);
+    }
+
+    public void sendBlockChange(Location loc, int material, byte data) {
+        Packet53BlockChange packet = new Packet53BlockChange(
+                loc.getBlockX(), loc.getBlockY(), loc.getBlockZ(),
+                ((CraftWorld) loc.getWorld()).getHandle());
+        packet.d = material;
+        packet.e = data;
+        getHandle().netServerHandler.sendPacket(packet);
+    }
+
     @Override
     public boolean teleport(Location location) {
         WorldServer oldWorld = ((CraftWorld)getWorld()).getHandle();