Bug fix release, new API release.

• Move functions related to s3 urls to a new pkg (#579) (13 days ago)
• s3-endpoints:Added eu-west-2 to the endpoint list. (#572) (2 weeks ago)
• client: Consolidate parsing URLs. (#569) (3 weeks ago)
• api: GetObject, StatObject should return more metadata. (#568) (3 weeks ago)
• Add PutObjectWithMetadata() API (#566) (3 weeks ago)
• Move s3 signature v4 and v2 to a separate pkg (#562) (3 weeks ago)
• s3-endpoints.go: Added Canada (Central) to the endpoint list. (#564) (3 weeks ago)
• api: res.Body should be closed properly (#561) (3 weeks ago) <Vyacheslav Kim (Kane)>
• list: Don't send incomplete uploads info with err (#556) (5 weeks ago)
• upload: generate a new mpart ID when NoSuchUpload (#557) (5 weeks ago)
• fix max retry issue in RemoveObject() (#555) (6 weeks ago)
• Avoid shadowing doneCh. (6 weeks ago)
• Add an everlasting binomially increasing retry. (#553) (6 weeks ago)
• getReaderSize() returns -1 in case of read/write os.Pipe() stream (#551) (7 weeks ago)
• Allow to add success_action_status to policy (#549) (7 weeks ago)
• Copy headers when following redirect URL and process special 307 http header (#550) (7 weeks ago)
• Fix wrong check in uploading multipart stream (#546) (9 weeks ago)
• RemoveObjects should not invoke MultiObjects DELETE S3 API when no objects are received (#545) (9 weeks ago)
• s3-endpoints.go: Added Ohio Region, US East 2 (#544) (9 weeks ago)
• Fix race in parallel uploads in file/readat (#543) (10 weeks ago)
• Fix resumable uploads in file/readat (#542) (10 weeks ago)
• api: relax strict Content-Length check for GCS. (#535) (2 months ago)