README: log entries for the last 20 revisions
689    2010-12-29
	Fixed bug in exporting to ics. Improved documentation for weekday
	(thanks Adam).
688    2010-12-22
	Added settings for the colors for the command line interface to the
	rc file.
687    2010-12-21
	Don't check for local time zone unless auto_set_timezone is True.
	Fixed undefined 'tmp_d' error in select_items.
686    2010-12-14
	Removed the 'm' from the time of the next alert when use_ampm is
	True. Tweaks for dealing with a missing local time zone.
685    2010-12-11
	Added the ability to specify an alternative command using @A COMMAND
	to run instead of the default for an event or reminder.
684    2010-12-10
	Possible fix for windows registry issue with timezones.
683    2010-12-10
	Added settings for first and second column widths in the gui item
	list to the rc file.
682    2010-12-09
	Added cleanPks to new_version routine. Display local time zone in
	GUI tdy. Added zone stuff to on-line docs and help text.
681    2010-12-07
	More zone fixes.
680    2010-12-05
	Added Shift plus Space completion for @z. Added gettz check for @z
	in check_hash.
679    2010-12-05
	Add @ ZONE using zone returned by get_localtz() when saving unless
	@z is already set.
678    2010-12-05
	Recurrence rules seem to be working. GUI loads ok, edit and save not
	yet updated.
677    2010-12-04
	Zone stuff seem to be working.
676    2010-12-03
	Rolled back etmData and etmParsers to 673.
675    2010-12-03
	About to fork a clone for zone experimentation.
674    2010-11-30
	First pass at processing zone information without generating
	exceptions.
673    2010-11-29
	Enhanced time parsing. Entering, e.g., 10, 10a, 1000 and 10:00 all
	give 10:00(am). In the ending time field (@e) for events
	additionally accept plus time strings such as +90, +1:30 and +1h
	30m.
672    2010-11-29
	Fixed bug in comparing dates for backup.
671    2010-11-29
	Fixed bug and improved parsing of @e. Acceptable formats now include
	time strings with or without colons (10:30, 1000) and time addition
	strings beginning with a '+' (+90, +1:30, +1h 30m) to be added to
	starttime.
670    2010-11-27
	Added ability to prefix an omit string with an ! to reverse its
	meaning. E.g., '-o e' would omit events but '-o !e' would omit
	everything except events.
