[ZPT] Default tal/tales namespaces in HTML parser

[Evan Simpson]

From: "Guido van Rossum" <guido@digicool.com>
> I find this both convenient (saves two lines of junk in each template)
> and helpful for consistency (everybody will tend to use "tal:" and
> "tales:" for their prefixes, aiding code portability), but it is
> probably in violation of some HTML standard.
>
> Should I take it out?

Not unless we must, please.  I may easily be wrong, but I suspect that the
HTML standard hasn't a thing to say about namespace-d attributes.  It's good
that the XML side is strict and correct, but being able to omit the
namespace declarations in HTML is very nice.

Cheers,

Evan @ digicool