Add a hindu arabic to roman numerals converter

Summary:
Compute tables goal is to reduce the cyclometric complexity of the converter
methods.

Use case:

This code is refactored from the Smarty plugin shipped with Azhàr and Zed
to print numerals counters.

The lowercase string has been chosen.

Scope limitations:

This change doesn't contain a code to convert roman numerals into hindu
arabic numbers, as there is no use case established, but the compute
tables can help for that too.

Test Plan: Unit tests provided

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D1599