Minor tweak on Exp system + Diet's Cygnus quest line

Changed minimum level required to gain EXP of mob from -5 to -20 the mob level (players below that level sees a red-colored font when displaying higher-leveled mob HPbar). Thanks to DietStory dev team, fixed some quests for KoC.

scripts/portal/enterMagiclibrar.js

@@ -3,24 +3,31 @@
     Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
 		       Matthias Butz <matze@odinms.de>
 		       Jan Christian Meyer <vimes@odinms.de>
-
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as
     published by the Free Software Foundation version 3 as published by
     the Free Software Foundation. You may not use, modify or distribute
     this program under any other version of the GNU Affero General Public
     License.
-
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Affero General Public License for more details.
-
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+    Edited by: Kevin
 */
 function enter(pi) {
-		pi.playPortalSound();
-		pi.warp(101000003, 8);
-		return true;
-}
+    if(pi.isQuestStarted(20718)){
+        pi.playPortalSound();
+        var cml = pi.getEventManager("Cygnus_Magic_Library");
+        cml.setProperty("player", pi.getPlayer().getName());
+        cml.startInstance(pi.getPlayer());
+    }
+    else{
+        pi.playPortalSound();
+        pi.warp(101000003, 8);
+    }
+    return true;
+}