public static function addViewPath( $path )
    {
        self::$_viewPaths = array_merge(
            Option::clean( self::$_viewPaths ),
            array($path)
        );

        self::$_twigLoader = new \Twig_Loader_Filesystem( self::$_viewPaths );
        self::$_twigEnvironment = new \Twig_Environment( self::$_twigLoader );
    }