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#------------------------------------------------------------------------
# Version 1.00 Date: 1998/02/10 09:26:44
#------------------------------------------------------------------------
* Initial revision
#------------------------------------------------------------------------
# Version 1.01 Date: 1998/02/10 09:40:40
#------------------------------------------------------------------------
* Minor documentation changes
#------------------------------------------------------------------------
# Version 1.02 Date: 1998/04/16 14:10:16
#------------------------------------------------------------------------
* Fixed minor typos and corrected example in documentation.
#------------------------------------------------------------------------
# Version 1.03 Date: 1999/01/19 15:57:43
#------------------------------------------------------------------------
* Incorporated patches from Andreas Koenig to inline calculation of
$instance variable. This results in a speedup of around 35%.
* Added _new_instance() constructor which is called the first time
_instance() is called. This can be overloaded in derived classes
to provide more specific object initialisation.
* Updated documentation accordingly.
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