#25 Multibyte support not tested during installation and errors

[Carlo Bertelli]

If multibyte support is not installed and enabled this line
$OUT.=($c==count($array)) ? mb_strtolower($name, FRONT_ENCODING) : "".mb_strtolower($name, FRONT_ENCODING)."";
in inc/layouts.php gives an error.
Obviously it runs in normal installations (ascii table names) substituting mb_strlower() with strlower(), but VFront should test multibyte availability on istallation.