Added Mine & Caverns raise & lower functionality

Added Mine & Caverns raise & lower functionality.  Revamped Level 1 events to match PnP.  Updated Level 1: Core.  Added new Footcatcher trap type. Added Underwater heartbeat to Glop Lake Underwater.  Full compile.

_module/nss/ra_lvl01_onenter.nss

@@ -0,0 +1,89 @@
+//::////////////////////////////////////////////////////////////////////////////
+/*//
+
+    Level 1: The Lair of the Dung Beast
+        onEnter script
+            ra_lvl01_onenter.nss
+
+    Wandering Monsters: Check once per 30 minutes on 1d20
+
+    Detections: Faint evil from the whole place; slightly more to the south east.
+
+    Continuous Effects: The stench of this level requires all characters to make
+    a Fortitude save (DC 10) upon entering the level and every 30 minutes
+    thereafter or all rolls are at –2 morale penalty due to the distraction
+    caused by the overpowering smell.
+
+*///
+//::////////////////////////////////////////////////////////////////////////////
+
+#include "spawn_functions"
+#include "tgdc_explore_inc"
+
+void StenchMessage(object oPC = OBJECT_SELF)
+{
+//:: Only fire for (real) PCs.
+    if ( !GetIsPC(oPC)  ||  GetIsDMPossessed(oPC) )
+        return;
+
+//:: Have text appear over the PC's head.
+    FloatingTextStringOnCreature("As you enter this area, a terrible, overpowering stench assaults your senses.", oPC, FALSE);
+}
+
+void main()
+{
+//:: Get the entering object (usually a PC)
+    object oPC      = GetEnteringObject();
+
+//:: Only fire once per PC.
+    if (!GetLocalInt(oPC, "DO_ONCE__" + GetTag(OBJECT_SELF)) )
+    {
+        StenchMessage(oPC);
+
+        SetLocalInt(oPC, "DO_ONCE__" + GetTag(OBJECT_SELF), TRUE);
+    }
+
+    /*
+    Spawn_OnAreaEnter() can take three arguments - the name of the heartbeat
+    script to execute, the heartbeat duration, and a delay for the first
+    heartbeat.  They default to spawn_sample_hb, 6.0, and 0.0 respectively; as
+    if it were called like: Spawn_OnAreaEnter( "spawn_sample_hb", 6.0, 0.0 );
+    */
+
+    if ( GetIsAreaAboveGround( OBJECT_SELF ) && ! GetIsAreaNatural( OBJECT_SELF ) )
+    {
+    //:: Indoors - no delay on the first HB
+        Spawn_OnAreaEnter( "spawn_sample_hb", 6.0, 0.0 );
+    }
+    else
+    {
+    //:: Outdoors or underground - do a 3 second delay on the first HB
+        Spawn_OnAreaEnter( "spawn_sample_hb", 6.0, 3.0 );
+    }
+
+//:: Records that the PC has entered Rappan Athuk at least once.
+    SetLocalInt(oPC, "bEnteredDungeon", 1);
+    SetLocalInt(oPC, "bEnteredLevelOne", 1);
+}
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