form captcha improvements

This function makes use of two files in the saf files located at saf/lib/Security. (figlet and turing)
IE <= 7 does not support the usage of turing images so uses figlets instead.

Files altered:
/saf/lib/MailForm/Widget/Security.php

Added into inc/app/sitellite/boxes/util/custom/index.php:

$w =& $this->addWidget ('security', 'Security');

$ps = new phpSniff ();
$version = substr(strstr($_SERVER['HTTP_USER_AGENT'], 'MSIE'),5,1);
if ($ps->property ('browser') == 'ie' && $version <= 7){
  $w->verify_method = "figlet";
}
else
  $w->verify_method = "turing";

Added into inc/app/sitellite/boxes/util/contact/form.php:

[security]

alt = Security
type = security
verify_method = figlet

Added into inc/app/sitefaq/forms/submission/settings.php:

[security_test]

type            = security
alt             = Security test
verify_method   = phpcaptcha