Replace "money" in in-game texts with "gold"

When GOLDOBJ was activated unconditionally, several texts started referencing
"money" instead of "gold".

As we don't have the intention to introduce a complex coin system with
different denominations, change it back and also some other places that
reference "money".

src/sit.c

@@ -25,7 +25,7 @@ take_gold()
     if (!lost_money) {
         You_feel("a strange sensation.");
     } else {
-        You("notice you have no money!");
+        You("notice you have no gold!");
         g.context.botl = 1;
     }
 }