[Distutils] Immutability of Release Metadata in Warehouse

[Sumana Harihareswara]

For those who want to track the relevant GitHub issues:

* supporting Markdown https://github.com/pypa/warehouse/issues/869
* staged releases https://github.com/pypa/warehouse/issues/726
* advising packagers to run `python setup.py check -r -s`
https://github.com/pypa/python-packaging-user-guide/issues/210

-- 
Sumana Harihareswara
Changeset Consulting
https://changeset.nyc