+ Revision 1.3 2002-09-28 06:58:45 arjen
+ Bugfix: conversion of an empty string to a date or hour object
+ now makes the values of such an object 0 (null) instead of giving
+ a segmentation fault.
+ The class UTC combines the date and hour classes. The most basic
+ functions of the UTC class are now implemented.
+ These include constructors and conversion to and from String objects.
+ New functions: date::proper(), hour::proper() and UTC::proper().
+ Return true if the object holds a proper clock time and/or calendar
+ date; false if at least one value is out of range.
+
+ Revision 1.2 2002/09/02 06:18:20 arjen