Give an indication of the force relay binding.

Play the ding sound and removed the unused swingItem as it is never
called. Closes #1089

src/main/java/vazkii/botania/common/item/ItemTwigWand.java

@@ -160,9 +160,8 @@ public class ItemTwigWand extends Item16Colors implements ICoordBoundItem {
 			BlockPistonRelay.playerPositions.remove(par2EntityPlayer.getCommandSenderName());
 			BlockPistonRelay.mappedPositions.put(bindPos, currentPos);
 			BlockPistonRelay.WorldData.get(par3World).markDirty();
-
-			if(par3World.isRemote)
-				par2EntityPlayer.swingItem();
+			
+			par3World.playSoundAtEntity(par2EntityPlayer, "botania:ding", 1F, 1F);
 		}
 
 		return false;