Allow Address objects to have their attributes written to (instead of read-only). Also, omit the :region attribute for billing addresses (don't know why, but this is how it's specced in the API).
Allow Address objects to have their attributes written to (instead of read-only). Also, omit the :region attribute for billing addresses (don't know why, but this is how it's specced in the API).

PayTrace/paytrace_ruby,PayTrace/paytrace_ruby