Add option to use scoreboards for power level display, similar to the

Spout titles. This will NOT override any existing plugin that uses the
overhead scoreboard slot.

src/main/java/com/gmail/nossr50/runnables/scoreboards/ScoreboardChangeTask.java

@@ -19,6 +19,7 @@ public class ScoreboardChangeTask extends BukkitRunnable {
     public void run() {
         if (player.isOnline()) {
             player.setScoreboard(oldScoreboard);
+            ScoreboardManager.enablePowerLevelDisplay(player);
         }
 
         ScoreboardManager.clearPendingTask(player.getName());