[Python-3000] Support for PEP 3131

["Martin v. Löwis"]

> I think this whole debate could be put to rest by
> agreeing to err on the side of ascii in 3.0 beta, and
> if in real world experience, that turns out to be the
> wrong decision, simply fix it in 3.0 production, 3.1,
> or 3.2.

Likewise, this whole debate could also be put to rest
by agreeing to err on the side of unrestricted support
for the PEP, and if that turns out to be the wrong
decision, simply fix any problems discovered in 3.0
production, 3.1, or 3.2.

IOW, any debate can be put to rest by agreeing.

Regards,
Martin