public static function save($filename, $data = array())
{
$base = array('version' => null, 'data' => null);
$version = AppData::first();
$base['version'] = array('schema' => $version->schema_version, 'data' => $version->data_version, 'seq' => $version->data_sequence_no, 'built' => date('Y-m-d H:i:s'));
$base['data'] = $data;
file_put_contents(FileHandler::path() . $filename . '.json', json_encode($base));
}
