Log Message:
Version 2.1.2
Additions:
* Add a README document for the code base.
Changes:
* Migrate code project hosting to Pagure.
  Record the change of homepage URL in PyPI metadata.
* Raise a warning that the ‘runner’ module is pending deprecation.
  This has been an unofficial example module from the beginning, and
  it will be removed in a future version.
Bug Fixes:
* Ensure custom types are part of the Python type hierarchy.
* Avoid a circular dependency for the version string at install time.