[tei-council] changes to change ... one more detail

[Syd Bauman]

>      <date>19990810/22:31:38</date>

I'm not sure if the use of the solidus there is a typo or what you
actually have in your P4 files. But P5 requires the W3C format:
  1999-08-10T22:31:38
The stylesheet I referred to does not do anything to fix the format,
it just copies whatever is there (from date/@value if present, from
date/text() if not) over to the right place.