Add py-rules 2.0.1

rules is a tiny but powerful app providing object-level permissions to Django,
without requiring a database. At its core, it is a generic framework for
building rule-based systems, similar to decision trees. It can also be used as a
standalone library in other contexts and frameworks.

WWW: https://github.com/dfunckt/django-rules

PR: 239102
Submitted by: Alexander Sieg <alex@xanderio.de>