add debug for spawned/despawned event

Author: mcmonkey4eva

src/main/java/org/mcmonkey/sentinel/SentinelTrait.java

@@ -1845,6 +1845,7 @@ public void run() {
      */
     @Override
     public void onSpawn() {
+        debug("Spawned.");
         isBlocking = false;
         lastEntityUUID = getLivingEntity().getUniqueId();
         stats_timesSpawned++;
@@ -2094,6 +2095,7 @@ public void run() {
      */
     @Override
     public void onDespawn() {
+        debug("Despawned.");
         targetingHelper.currentTargets.clear();
         targetingHelper.currentAvoids.clear();
         SentinelPlugin.instance.currentSentinelNPCs.remove(this);