Coding Dojo: Roman Numerals

We will practice the Roman Numerals kata: http://codingdojo.org/kata/RomanNumerals/

Following a discussion on a previous kata, we will try to apply the different methods of implementing this kata:
- Property based testing
- Using an enum to store the simple letters: I, V, X, ...
- Using an enum to store all the letters: I, IV, V, IX, X, ...
- Converting to "I", then grouping the characters
- Functional style vs object oriented style

At the end, we will try to compare solutions. No need to reach an agreement on which one is the best.