Nihal quests + Reactor's mapitem detection + MapleQuestMesoFetcher

Improved quests and game progression in the Nihal Desert region.
Reactors that uses map items now automatically detects those already on the ground after changing states.
New tool: MapleQuestMesoFetcher. This tool parses the Quest.wz XML files, detecting and reporting quest ids from quests that does not properly checks for mesos to take from the player before completing the quest.

src/server/maps/MapleMap.java

@@ -1214,6 +1214,10 @@ public class MapleMap {
             objectRLock.unlock();
         }
         
+        resetReactors(list);
+    }
+    
+    public final void resetReactors(List<MapleReactor> list) {
         for (MapleReactor r : list) {
             r.lockReactor();
             try {
@@ -1524,7 +1528,7 @@ public class MapleMap {
     }
 
     public Point getGroundBelow(Point pos) {
-        Point spos = new Point(pos.x, pos.y - 3); // Using -3 fixes issues with spawning pets causing a lot of issues.
+        Point spos = new Point(pos.x, pos.y - 7); // Using -7 fixes spawning pets causing a lot of issues.
         spos = calcPointBelow(spos);
         spos.y--;//shouldn't be null!
         return spos;