iso9660.h, iso9660_fs.c: Add iso9660_ifs_is_xa() a routine to

determine if an iso image has XA attributes.

bytesex.h and bytesex_asm.h are now public. (Down the line should use
glib though.) Package  has been revised to the move.

iso-info.c: shows XA attributes what that it is available.

lib/xa.c

@@ -1,5 +1,5 @@
 /*
-    $Id: xa.c,v 1.4 2003/09/21 01:14:30 rocky Exp $
+    $Id: xa.c,v 1.5 2004/10/22 01:13:38 rocky Exp $
 
     Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
     Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
@@ -31,10 +31,10 @@
 /* Public headers */
 #include <cdio/iso9660.h>
 #include <cdio/util.h>
+#include <cdio/bytesex.h>
 
 /* Private headers */
 #include "cdio_assert.h"
-#include "bytesex.h"
 
 #define BUF_COUNT 16
 #define BUF_SIZE 80