date and time comparision in ACEDB

[Richard Durbin]

We now have a DateType as a basic type like Int, Float, Text.  This
was implemented during the 1994 ACEDB workshop, and will be in the
next main release, later this fall.  It shows the date and time to
the second, and can parse in just a date, just the time (implicit
todays date -- I think this is there!) and "now" (current date/time).
'>' and '<' will work with items from this type.

I'm not so sure about set operations in queries.  I'll leave that
to Jean.

Richard