DataUtilXmlImpl now fully implemented -- completion of loadData which
now extracts meeting information in much the same way as it extracts
contact data. 
Added the final (forgotten) piece of functionality for Calendarutil that
allows string representations of Calendar objects (produced by
format()) to be parsed with parse(String) back into Calendars. This
makes storing and retrieving the date of a meeting to/from xml nice and
simple.