Exp gain & Chaos scroll fix + Diet's MK Overhaul

Fixed issues with negative experience being distributed to characters
when killing a mob, rendering "Exp reset". Fixed chaos scroll behaving
oddly. Refactored debuff expirations to manage one list with registered
debuffs and expire times, thus lifting some load from the TimerManager.
Added concurrency protection on how World deals with parties. Thanks to
the DietStory dev team, fixed some issues with the MK maps.

scripts/quest/20710.js

@@ -0,0 +1,35 @@
+/*
+	Author: DietStory dev team
+	NPC: Matthias
+	Quest: Hidden Inside the Trash Can
+*/
+
+
+var status = -1;
+
+function start(mode, type, selection){
+	if(mode == -1){
+		qm.dispose();
+		return;
+	}
+	else if(mode == 0 && status == 0){
+		qm.sendOk("What? Are you declining the mission? Fine, do it like that. I'll just report it straight to #p1101002#.");
+		qm.dispose();
+		return;
+	}
+	else if(mode == 0){
+		status--;
+	}
+	else{
+		status++;
+	}
+
+
+	if(status == 0){
+		qm.sendAcceptDecline("You don't really instill confidence in me, but since you're a Cygnus Knight and all... and since no one else can go on a search right now... Okay, let me explain to you what this mission is about.");
+	}
+	else if(status == 1){
+		qm.forceStartQuest();
+		qm.dispose();
+	}
+}