Make contributing to permon on Windows easier

[bminixhofer]

At the moment, contributing to Permon is only well supported on Linux. The issues are:

• The scripts provided in the bin directory are bash scripts. They are not trivial to get to work on windows. It is not clear to me what the best solution would be. The things I've considered are:

1. Make .bat version of each script. That is kind of inelegant and creates a lot of redundancy.
2. Rewrite the scripts in Python. This is in my opinion more viable but might take overly much code compared to the shell version.

• The contributor guide is aimed at Linux users and uses Linux commands. This should be made platform independent without making it much more complex.