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.