- Make ``zope.app.twisted`` and ``zope.app.server`` optional dependencies by
  putting them into extras. They are not needed at all, if we use PasteScript
  to start up the application server.

- Added license and copyright file. Also fixed copyright statement in file
  headers.

- Added manifest.
Some cleanup before trying to embark on more serious matters.
Made the Paste test app work with waitress. Yipee.
Implemented our own paste serve. Well, that was easy. ;-)
And here are some tests.
Add update.
- Added support for Python 3.3.

- Dropped support for Python 2.4 and 2.5.

- Removed support for employing WSGI middlewares inside a Zope 3
  application. Only the script-based server startup is now supported.