Add release notes for Django Evolution 2.0.

Review Request #11128 — Created Aug. 9, 2020 and submitted — Latest diff uploaded

Information

Django Evolution
master

Reviewers

This is a really huge release. A pretty substantial rewrite. While
there's all sorts of internal changes, there are too many to list.

These new release notes cover the more user-facing changes and features
added to Django Evolution 2.0, and touches upon some of the more
important internal-ish changes (such as the new evolver API and
signature format).

Checked for spelling and build errors.

Checked for broken links.

Commits

Files