* Translate setup.py to pyproject.toml
* Introduce PEP518 by using Poetry as package manager
* Introduce PEP402-ish package structure
* Remove requirements.txt and setup.py
* Update Dockerfile and Docs for new packaging method
* Bump dependencies, remove six
six is no longer necessary as of docker-py 5.0.1 (see https://github.com/docker/docker-py/pull/2863)
I added a bit of information about installing this tool to the system and about my AUR packages.
Also the PyPI version is outdated (1.0.1 from Jan 3 2016, https://pypi.org/project/docker-autocompose/#history), is it still supported?
