Port to Python 3
This replaces the script runtime interpreter with Python 3, by switching one package with another.
Additionally, we propose some sane defaults one could like to see in a repository like this. Namely:
- a
README.md
(with a mention of the licence terms) - a
.gitignore
file to put things out of sight we don't need - an
.env.example
that shows which environmental variables we expect in.env