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/save.c

@@ -1296,6 +1296,7 @@ void
 freedynamicdata()
 {
 	unload_qtlist();
+	free_menu_coloring();
 	free_invbuf();	/* let_to_name (invent.c) */
 	free_youbuf();	/* You_buf,&c (pline.c) */
 	tmp_at(DISP_FREEMEM, 0);	/* temporary display effects */