Version 0.9.4 throws fatal error when using PHP 5.3 or older

[ktbartholomew]

Confirmed on PHP 5.3 running under IIS.

with WP_DEBUG enabled, complains about a syntax error (unexpected [) on https://github.com/ktbartholomew/saml-20-single-sign-on/blob/master/src/saml/config/authsources.php#L9

Confirmed that changing that section to two separate statements fixes the issue.

$idp = array_keys(parse_ini_file($idp_file ,true));
$idp = $idp[0];