Spell & Ability Upgrade

Reorganized hak files & removed duplicates.  Added @rafhot's PRC spell & ability level scaling expansion.  Further script integration.  Full compile.

_module/nss/artifact.nss

@@ -1,4 +1,6 @@
 #include "x2_inc_switches"
+#include "prc_inc_spells"
+
 void main()
 {
 int nEvent =GetUserDefinedItemEventNumber();
@@ -23,7 +25,7 @@ OBJECT_SELF); break;
 ExecuteScript("sp_"+GetTag(GetModuleItemLost()),
 OBJECT_SELF); break;
    case X2_ITEM_EVENT_ONHITCAST:
-ExecuteScript("on_"+GetTag(GetSpellCastItem()),
+ExecuteScript("on_"+GetTag(PRCGetSpellCastItem()),
 OBJECT_SELF); break;
    }
 }