Version 0.51.0

Improve changelog to emphasise SQL migration scripts.

Version 0.50.0

Version 0.49.0

Version 0.48.0

Version 0.47.1

Version 0.47.0

Version 0.46.0

Version 0.45.0

Update changelog to include (hopefully) all changes.

Version 0.44.1

Version 0.44.0