Concurrency fix + new scripts

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

scripts/portal/balog_end.js

@@ -0,0 +1,9 @@
+function enter(pi) {
+	if (!pi.canHold(4001261,1)) {
+		pi.playerMessage(5, "Please make 1 ETC room.");
+		return false;
+	}
+	pi.gainItem(4001261,1);
+	pi.warp(105100100,0);
+	return(true);
+}