Prepare for Python Package Index (PyPI)

[valentinitnelav]

Follow this tutorial to have the package ready for pip.

Perhaps, also see https://betterscientificsoftware.github.io/python-for-hpc/tutorials/python-pypi-packaging/

[valentinitnelav]

I will most probably have to use argparse with start_project.py and define a main function there, so that it can be used from within Python and not only from the command line.