Area Cleanup. Added CEP3 Skyboxes

Area Cleanup.  Added CEP3 Skyboxes.  Beholder AI fix.  NPC & Mook pass.  Added QN OnHit script.  Add XP for Traps system.

_module/nss/ra_trp_sec_reset.nss

@@ -0,0 +1,12 @@
+/* User-defined event script to reset a secret item after a delay of
+ * 30 minutes.
+ */
+
+#include "x0_i0_secret"
+
+void main()
+{
+    if (GetUserDefinedEventNumber() == EVENT_SECRET_REVEALED) {
+        DelayCommand(1800.0, ResetSecretItem());
+    }
+}