Localisation module for tax identifier- Australia

[vincent (Vincent Bastos)]

@ced

I think it makes sense to include in party module because we have the tax_identifier notion that is reused in other modules.
Indeed I’m wondering if the best will not be to include all tax identifiers of python-stdnum .

OK, I didn’t think everyone would want to have all the tax identifiers. I wonder if we should have a separate module just for the rest of the tax identifiers.