Add menucolors

-Add a boolean option menucolors to toggle menu color
-Add MENUCOLOR -config file option

TODO:
-Better support for win32
-Support more windowports
-Update Guidebook
-Allow changing menucolor lines in-game

src/files.c

@@ -2290,6 +2290,8 @@ int		src;
 	} else if (match_varname(buf, "BOULDER", 3)) {
 	    (void) get_uchars(fp, buf, bufp, &iflags.bouldersym, TRUE,
 			      1, "BOULDER");
+	} else if (match_varname(buf, "MENUCOLOR", 9)) {
+	    (void) add_menu_coloring(bufp);
 	} else if (match_varname(buf, "WARNINGS", 5)) {
 	    (void) get_uchars(fp, buf, bufp, translate, FALSE,
 					WARNCOUNT, "WARNINGS");