Client clean-up + PiratePQ Implementation

Major update on client packets, now properly making unseen killed
monsters not appear as residual on a player's client. Many updates
revolving the PiratePQ environment as well.

src/server/life/MapleMonster.java

@@ -82,7 +82,7 @@ public class MapleMonster extends AbstractLoadedMapleLife {
     private int team;
     private final HashMap<Integer, AtomicInteger> takenDamage = new HashMap<>();
 
-    public ReentrantLock monsterLock = new ReentrantLock();
+    private ReentrantLock monsterLock = new ReentrantLock();
 
     public MapleMonster(int id, MapleMonsterStats stats) {
         super(id);
@@ -93,6 +93,14 @@ public class MapleMonster extends AbstractLoadedMapleLife {
         super(monster);
         initWithStats(monster.stats);
     }
+    
+    public void lockMonster() {
+        monsterLock.lock();
+    }
+    
+    public void unlockMonster() {
+        monsterLock.unlock();
+    }
 
     private void initWithStats(MapleMonsterStats stats) {
         setStance(5);
@@ -994,7 +1002,7 @@ public class MapleMonster extends AbstractLoadedMapleLife {
         return(1.0f);
     }
     
-    public final void changeLevelByDifficulty(final int difficulty, boolean pqMob) {
+    private final void changeLevelByDifficulty(final int difficulty, boolean pqMob) {
         changeLevel((int)(this.getLevel() * getDifficultyRate(difficulty)), pqMob);
     }