* Improve error for docker modules when docker-py can't be imported.
* Add changelog.
* Mention platform and Python interpreter in more cases.
* Clarify wording.
* Adjust tests.
* Mention Docker SDK for Python instead of docker-py / docker.
* Docs fixes.
* Add myself as docker_container author.
* Use array syntax for running command.
* Break long lines.
* Avoid failure when docker_version is None.
* Improve docker-py vs. docker note in requirements.
* Canonicalize Docker SDK for Python upgrade instructions.
* Split long line.
* Make it clearer which hostnames are meant.
* Move docker_ module_utils into subpackage.
* Remove docker_ prefix from module_utils.docker modules.
* Adding jurisdiction for module_utils/docker to $team_docker.
* Making docker* unit tests community supported.
* Linting.
* Python < 2.6 is not supported.
* Refactoring docker-py version comments. Moving them to doc fragments. Cleaning up some indentations.
