Envrc with python virtual environments works weirdly. For example, PS1
claims to get updated, but my prompt stays the same.

It also made testing the code with the system python needlesly
complicated.

While both have problems, and neither is that well documented, libgit2
handles seems to handle branches slightly better by being "lower level".

It previously worked due to my git personal git configuration.
Probably the line `push.default=current`.

Add basic documentaion of my Puppetfile.yaml format, also move
puppetfile specification away from main.py.

Remove ignore of D100 (Missing docstring in public module) from
pydocstyle, and subsequentially introduce module documentation of all
module.

At the same time, improve general documentation of code, while moving
some functions to be private to simplify the code.

Apparently expected of modules which should be type checked.

Apparently flake8 didn't check my documentation.

.mypy_cache shouldn't be indexed. This also speeds up the tag generation
significantly.

It should actually find the modules now.

It should already by covered by flake8 --doctest