Modernize function implementations and docstrings in scripts/time. * addtodate.m: Add millisecond functionality. Update docstring and %!tests. * calendar.m: Implement faster way to add '*' to day display. Update docstring. * weekday.m: Use more modern coding stytle. Update docstring. * asctime.m, clock.m, ctime.m, date.m, datenum.m, datestr.m, datevec.m, eomday.m, etime.m, is_leap_year.m: Update docstring and/or use Octave formatting spacing conventions for %!tests.

--- a/scripts/time/datestr.m	Thu Nov 10 02:50:51 2011 -0500
+++ b/scripts/time/datestr.m	Thu Nov 10 13:35:08 2011 -0800
@@ -103,7 +103,7 @@
 ## If a matrix or cell array of dates is given, a column vector of date strings
 ## is returned.
 ##
-## @seealso{datenum, datevec, date, clock, now}
+## @seealso{datenum, datevec, date, now, clock}
 ## @end deftypefn
 
 ## FIXME: parse arbitrary code strings.