- Make it clear that for :class:`DatabaseFromEnvironment` to check a port is up, the port must be specified.
- Fix bug when no port was specified in a :class:`DatabaseFromEnvironment` url.
- Add :class:`DatabaseFromEnvironment` service.
- :class:`Provider` can now be used to choose the first available :class:`Service` that provides an instance.
- Initial release featuring simple container services with helpers for common databases.