- _Removed deprecations!_ `luigi.{hadoop, hadoop_jar, hdfs, hive, scalding, webhdfs}` are removed, use `luigi.contrib.{..}` instead https://github.com/spotify/luigi/pull/1995
- _Deprecations!_ `luigi.{postgres, s3}` are now moved into `luigi.contrib`. https://github.com/spotify/luigi/pull/1997
- Multiple workers finally works for Windows again! https://github.com/spotify/luigi/pull/1992
- Server can now communicate with the clients! We started small and implemented so `--workers` can be set. https://github.com/spotify/luigi/pull/1993
- Make the visualizer put your search queries in the URLs hash. So links are now finally shareable! https://github.com/spotify/luigi/pull/1986 https://github.com/spotify/luigi/pull/2002
- A new recommended way to automatically set the task namespace! https://github.com/spotify/luigi/pull/2000 [(docs)](http://luigi.readthedocs.io/en/latest/api/luigi.task.html#luigi.task.auto_namespace)
There have been a lot of other bugfixes, docsfixes, cleanups and added testcases! See all commits
[here](https://github.com/spotify/luigi/compare/2.5.0...2.6.0).