Log Message:
- Updated Date-Calc to 5.4

 +  Added compiler directives for C++.
 +  Removed "Carp::Clan" from the distribution (available separately).
 +  Fixed bug in initialization of "Date::Calendar::Year" objects.
 +  Added method "tags()" to "Date::Calendar" and \ 
"Date::Calendar::Year".
 +  Fixed the formula for "Labor Day" in the U.S. to "1/Mon/Sep".
 +  Added a new recipe to the "Date::Calc" documentation.
 +  Added Romanian to the list of languages supported by "Date::Calc".
 +  Changed the example script "calendar.cgi" to highlight the name
    which led to a given date being a holiday.
 +  Fixed the Polish entries in "Date::Calc".
 +  Added a few commemorative days to the Norwegian calendar profile.
 +  Added "use bytes" to all Perl files to avoid problems on systems
    not using the standard locale "C".
 +  Fixed test 5 of t/m005.t to (hopefully) work under other locales.