public function __construct(array $options = array())
{
$defaults = array('header_style' => 'setext', 'suppress_errors' => true, 'strip_tags' => false, 'bold_style' => '**', 'italic_style' => '_', 'remove_nodes' => '');
$this->environment = Environment::createDefaultEnvironment($defaults);
$this->environment->getConfig()->merge($options);
}