Package the License and Readme

[jakirkham]

Add the License the Readme to MANIFEST.in so that they are included in sdists and related packages.

[jakirkham]

Failure is related to the fact that the --use-mirrors option has been dropped from pip and thus is orthogonal to this change and is present in master already.

[jakirkham]

cc @jochym

[mbrukman]

@jakirkham — thanks for putting this PR together!

Is packaging the README necessary anymore? It appears it's already included by default: https://packaging.python.org/en/latest/guides/using-manifest-in/#using-manifest-in

Also, I understand that MANIFEST.in is not necessarily used anymore (and per docs, it's removed from a sample project config).

I filed #69 to migrate setup.py to setup.cfg and also #70 to package the license file in the setup.cfg and assigned both of them to myself, so please feel free to close this PR and subscribe to either (or both) of those issues to follow the status of this work.

[jakirkham]

Yes thankfully the tooling has improved to make packaging license files easier.

The README is nice to have, but no don't think it is critically needed.

Will go ahead and close this out. Thanks for taking all of this on! 🙏