This adds a command 'version' to show software versions information
like Docker does. In addition it includes:
- version of the docker-py-package
- Python-implementation and -version
Signed-off-by: Frank Sachsenheim <funkyfuture@riseup.net>
Does not change directory to the parent with the compose-file found.
Works like passing '--file' or setting 'COMPOSE_FILE' with absolute path.
Resolves issue #946.
Signed-off-by: Aleksandr Vinokurov <aleksandr.vin@gmail.com>