增加：add meta data indexing api 删除：remove github.com/baiyubin/aliyun-sts-go-sdk/sts deps. 修改：remove chartset info in text/* mime type. 增加：add restore info in listObjects/listObjectVersions 增加：add x-oss-ac-* into subresource list. 修改：fix select object bug. 增加：getBucketStat api returns more info 增加：support X-Oss-Notification header in CompleteMultipartUpload api.