public function __construct(array $placeholder = array('[_TWITAL_[', ']_TWITAL_]'), array $options = array())
{
$this->placeholder = array('[_TWITAL_[', ']_TWITAL_]');
$this->options = array_merge(array('tag_block' => array('{%', '%}'), 'tag_variable' => array('{{', '}}')), $options);
}