Versioning WordPress style

versioned style

/**
 * Enqueue scripts and styles
 */
function version_id() {
	if ( WP_DEBUG )
		return time();
	$my_theme = wp_get_theme();
	$thversion = $my_theme->Version;

	return $thversion;
}

function stout_scripts() {
    wp_register_style('style', get_template_directory_uri() . '/css/style.css', array(), version_id(), 'all');
    wp_enqueue_style('style');

    wp_enqueue_style('googlefonts','http://fonts.googleapis.com/css?family=Open+Sans:200,400,700,600',array(),'1','all');
}