Modin

Ray updated
* Updated Ray dependency to 0.6 (284)
* Updated internal Ray API calls to reflect their API changes (284)

Bugfixes
* Various bugfixes for the python backend (274, 276)

New functionality
* `read_table` is now supported (270)
* `read_hdf` is now parallelized (264)

Code Refactor
* Making files more consistent (268)

Documentation
* Add new documentation to readthedocs (269)
* Fix link in documentation (280)

Contributors this release

The following users contributed code to Modin since the last release.

janpipek (New contributor) 🔰
eavidan (Returning contributor) 🌟
osalpekar (Committer)
williamma12 (Committer)
devin-petersohn (Admin)

🎉🎉 Thank you! 🎉🎉

Fix redis and `ray.init` re-initialization error.

Bugfixes

Bugfixes and minor refactoring.

This release contains multiple important bugfixes for MPI backend,
which makes it be more functional and stable.

Key Features and Updates
------------------------

* Stability and Bugfixes
* FIX-170: Fix serialization/deserialization for Ray actors (171)
* FIX-172: Fix serialization/deserialization for Dask actors (173)
* FIX-174: Fix serialization/deserialization for MPI actors (177)
* FIX-179: Handle None return values correctly on MPI backend (180)
* FIX-175: FIX-178: Fix nested remote calls of remote tasks and actor methods (176)
* FIX-187: Make Data_ID unique for different workers on MPI backend (188)
* FIX-183: Fix serialization of dict_keys for MPI backend (184)
* FEAT-185: Add communication logging (186)
* FIX-189: Fix Actor scheduling (190)
* FIX-191: Fix pendinq response after blocking GET request (192)
* FIX-195: Fix serialization for pandas and numpy objects (196)
* FIX-193: Fix actor async execution (194)
* FIX-197: Initialize a backend when doing unidist.put (198)
* Update testing suite
* TEST-181: Added async actor tests (182)

Contributors
------------
YarShev
Retribution98

Significant improvements in memory overhead. Rewrite of the backend of the system.