This is a simple Python kata about adding Roman numbers using string operations.
It is inspired by the description at http://codingdojo.org/kata/RomanCalculator/
It is being used at CamPUG (the Cambridge Python User Group) on Tuesday 7th March 2017 - see us on meetup.com at https://www.meetup.com/CamPUG/
See the docstring at the top of roman_adding.py for the aim of the kata, and see test_roman_adding.py for the unit tests.