Plone

Bug fixes:

- Release 6.0.0a2.
[maurits]

Bug fixes:

- Release 6.0.0a1.dev1.
Update: accidentally released as 6.0.0a1.
[maurits]

Breaking changes:

- Remove ``archetypes`` extra in ``setup.py``.
[jensens]

- Drop Python 2 support.
[jensens]

Misc:

- Create internal release on dist.plone.org. [maurits]

- Move ``setup.py`` metadata to ``setup.cfg``.
[jensens]

[maurits]

[maurits]

- Removed ``plone.app.dexterity`` from dependencies.
It is already required by ``Products.CMFPlone``.
[maurits]

[maurits]