Implemented EllinPQ + some bug fixes

Implemented EllinPQ, adjusted several drop rates and data, fixes some
bugs at quests at client-side.

scripts/event/4jberserk.js

@@ -154,6 +154,8 @@ function clearPQ(eim) {
     eim.dispose();
 }
 
+function monsterKilled(mob, eim) {}
+
 function allMonstersDead(eim) {
     eim.setProperty("canWarp","true");
 }