Update 2.3 Release Notes

[jakirkham]

Adds some content that was left out of the 2.3 release notes that has been included since the 2.2.0 release.

TODO:

• Add unit tests and/or doctests in docstrings
• Add docstrings and API docs for any new/modified user-facing classes and functions
• New/modified features documented in docs/tutorial.rst
• Changes documented in docs/release.rst
• Docs build locally (e.g., run tox -e docs)
• AppVeyor and Travis CI passes
• Test coverage is 100% (Coveralls passes)

[jakirkham]

I think this is ready for review and merge if someone has a chance to take a look.

cc @zarr-developers/core-devs

[rabernat]

I just read through these release notes and found no obvious problems or omissions.

[nbren12]

Thanks Joe. I feel like the 80-20 rule applies here though. Writing the prototype was the easy part.

…

On Thu, Mar 21, 2019 at 6:48 PM Joe Hamman ***@***.***> wrote: ***@***.**** commented on this pull request. ------------------------------ In docs/release.rst <#409 (comment)>: > @@ -36,7 +38,8 @@ Enhancements * Adds the MongoDB-backed :class:`zarr.storage.MongoDBStore` class enabling a MongoDB database to be used as the backing store for an array or group. - By :user:`Joe Hamman <jhamman>`, :issue:`299`, :issue:`372`. + By :user:`Joe Hamman <jhamman>`, :user:`John Kirkham <jakirkham>`, + :issue:`299`, :issue:`372`, :issue:`401`. can we add @nbren12 <https://github.com/nbren12> to the list of contributors here? He prototyped this and though his work doesn't show up in the commit record, he deserves 95% of the credit. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#409 (review)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABUokuOeg1MX_HtSgiR4ZUUY_Fw6nu1Eks5vZDZdgaJpZM4bGqgb> .

[jakirkham]

Have responded to the reviews. Please let me know if there is anything else needed 🙂

[alimanfoo]

LGTM

[jakirkham]

Thanks all. Will go ahead and cut the release now.