Fix #426 Get lib path dinamically

Author: pitbulk

src/Saml2/Settings.php

@@ -164,7 +164,7 @@ private function _loadPaths()
             'base' => $basePath,
             'config' => $basePath,
             'cert' => $basePath.'certs/',
-            'lib' => $basePath.'src/Saml2/'
+            'lib' => __DIR__ . '/',
         );
 
         if (defined('ONELOGIN_CUSTOMPATH')) {