Make VeRyPy installable with pip, preferably from PyPI

[yorak]

This would make it considerably easier to start using VeRyPy.

[yorak]

See stitching - A Python package for fast and robust Image Stitching. For inspiration and reference for file, test, and import structure.
https://github.com/lukasalexanderweber/stitching

[yorak]

Done thanks to the PR.