==================
- Bug fix: remove duplicate firing of ObjectCreatedEvent in
zope.file.upload.Upload (the event is already fired in its base class,
zope.formlib.form.AddForm).
- Move browser-related zcml to `browser.zcml` so that it easier for
applications to exclude it.
- Import content-type parser from zope.contenttype, adding a dependency on
that package.
- Removed undeclared dependency on zope.app.container, depend on zope.browser.
- Using Python's ``doctest`` module instead of deprecated
``zope.testing.doctest``.