Concurrency fix + new scripts

Fixed some situation involving concurrency upon using getCharacters()
from MapleMap, added scripts and other bug fixes.

scripts/npc/world0/1061018.js

@@ -0,0 +1,10 @@
+function start() {
+    cm.sendYesNo("If you leave now, you'll have to start over. Are you sure you want to leave?");
+}
+
+function action(mode, type, selection) {
+    if (mode == 1) {
+	cm.warp(105100301);
+    }
+    cm.dispose();
+}