I haven't converted the _c_htmltext module to use unicode strings
but I think pretty much everything else works:

  http://www.mems-exchange.org/software/files/tmp/q2_unicode.diff

I'd appreciate it if people experienced with international charsets
could review the design.  It seems to work but I'm pretty ignorant
of unicode.  When testing, you might want to change
HTTPResponse.charset attribute to 'UTF-8' instead.

  Neil