* HOL - calculate holidays and write to agenda file

** Change History

*** v.3.1

- New functionality: Support for different language versions, 
  in addition to English.
- New language versions: German, French.
- Improved Hebrew.hol
- New functionality: HFIX(#MONTH,0) calculates Rosh Chodesh.
- New functionality: the moonphase command is now able to calculate
  either all phase occurrences in a given month, or the first phase
  occurence after a given date.
- Bugfix: Selecting cancel is now honoured in the agenda writing
  and backup dialogs.
- Bugfix: corrected the moonphase example in Moon.hol .
- Bugfix: year_symb="" and year_symb=" " are now interpreted as
  no year symbol.

*** v.3.0

- New functionality: Calculation of moonphases.
- Bugfix: Some few hebrew dates may appear twice in a common year.
  This can be handled now.
- Bugfix: FLOAT dates are now also interpreted as non-repeatable.
- Bugfix: For year_symb="", v.2.2 wrote a black "blank"
  year symbol. Now there is no year symbol at all written in this case.
- Some Code Maintenance: replaced modulo procedures by OPL's 
  inbuilt MOD& call, simplified the, replaced the easter calculation by
  Oudin's algorithm, replaced the Rosh HaShanah calculation by John
  Conway's algorithm, replaced the calculation of Islamic dates by
  months based on a fixed lunation (this is as (in)accurate as the old 
  method, but by far less complicated). Instead of three different 
  timebases, now there is only one (01/01/1900).

*** v.2.2

- Initial version of Reto Beeler. Adds toolbar, scrollbar, and help file to
  v.2.1. Shortcut keys follow now the series 5 conventions.

*** v.2.1

- Initial version of Jean Luc Damnet. Hol5 numbering starts with v.2.1,
  because version 2.1 of Hol for the S3 has been ported.