Horntail PQ & Exped + Equip levelup fix

Added Horntail PQ and boss fight. Fixed short integer overflow of
equipment stats on client messing up player stats.

scripts/portal/enterWitch.js

@@ -0,0 +1,15 @@
+function enter(pi) {
+    if (pi.getQuestStatus(20407) == 2) {
+	pi.warp(924010200,0);
+        return true;
+    } else if (pi.getQuestStatus(20406) == 2) {
+	pi.warp(924010100,0);
+        return true;
+    } else if (pi.getQuestStatus(20404) == 2) {
+	pi.warp(924010000,0);
+        return true;
+    } else {
+	pi.playerMessage(5, "I shouldn't go here.. it's creepy!");
+        return false;
+    }
+}