==================
- Get rid of zope.app.zapi dependency, replacing its uses with
direct imports.
- Clean up dependencies, move testing and rotterdam dependencies
to extra requires.
- Fix mailing list address to zope-devzope.org instead of retired
zope3-devzope.org. Change `cheeseshop` to `pypi` in the package
url.
- Replace __used_for__ in adapters.py with zope.component.adapts
calls to make more sense.
- Remove obsolete zpkg files, zcml include file for mkzopeinstance-based
installations, versions.txt that makes no sense now.