* `meta/` directory in collections
* runtime metadata for redirection/deprecation/removal of plugin loads
* a compatibility layer to keep existing content working on ansible-base + collections
* a Python import redirection layer to keep collections-hosted (and otherwise moved) content importable by things that don't know better
* supported Ansible version validation on collection loads
* Fix location of unit test requirements.
* Preserve ansible-test unit test requirements.
* Remove redundant unit test requirements.
* Fix location of network test requirements.
* Preserve ansible-test network test requirements.
* Remove redundant network test requirements.
* Add missing ordereddict requirements.
* Load collection requirements correctly.
* Add changelog fragment.