* Generate `dati_riepilogo` with properly set `natura` (#27)
* Ignore non-significant digits when computing differences between Decimal fields
* a38tool diff: return exit code 0 if there are no differences
* Change Prezzo Unitario decimals precision to 3 digits, thanks @matteorizzello
* Fixed a rounding issue (#35), thanks @tschager
* Updated signature in test certificate