Added full CEP3 & Complete Rural/City tileset

Sarum City has been rebuilt with the new tileset, and all the exterior areas were combined into one. New areas added outside the city. They're called Environs.  Some additional areas redone to tie into the new areas. Environs are mostly decorated, but lack NPCs in some.  Those will be added later.

_module/nss/sitspeak.nss

@@ -0,0 +1,14 @@
+void main()
+{
+    if(GetCommandable(OBJECT_SELF))
+    {
+        // Standard response, but clear actions *after* the conversation starts.
+        BeginConversation();
+        ClearAllActions();
+
+        // Sit in the assigned chair.
+        string sChairTag = "CHAIR";
+        object oChair = GetNearestObjectByTag(sChairTag);
+        ActionSit(oChair);
+    }
+}