Add setup.py and prepare for packaging

[bennuttall]

I sorted it out enough for the pull-deploy and push-deploy scripts to get as far as trying to read the config file, so it probably works with a valid config file.

1. git clone
2. make a venv and activate it (see https://gist.github.com/bennuttall/9f35ab1f41136fbf10fd)
3. pip install boto3 requests pyyaml
4. python setup.py develop
5. python setup.py install (for scripts)
6. Sort out your config.yaml
7. Try running pull-deploy and push-deploy
8. Build sdist and wheel: python setup.py sdist bdist_wheel
9. ls dist will show the built files (a .tar.gz and a .whl)
10. Register on PyPI: https://pypi.org/account/register/
11. Put a .pypirc in your homedir
12. twine upload dist/*

See https://packaging.python.org/ for more info

Feel free to ping me if you have any questions.

[M1ke]

Thanks for this - sorry for my slow response! I'll test it myself and look to merge then deploy to pypi

[bennuttall]

I wondered if s3pulldeploy would be a better module name?