The Django Evolution README was horribly out-of-date. It didn't make a

good case for itself in the modern world, and gave the impression the

project hasn't been touched in many years.
This change completely rewrites the README. It's now in

ReStructuredText, instead of Markdown, and included as package metadata.

The new content talks about where Django Evolution is useful and touches

upon the compatibility with Django's migrations. It includes updated

compatibility information and a link to the (upcoming) public docs, plus

a blurb about its usage in Review Board.

Checked the rendered README and the new docs.
Built a package and verified the presence of the README in the metadata.