#------------------------------------------------------------------------ # Version 1.04 Date: 2007/09/28
#------------------------------------------------------------------------

• Added the has_instance() method to return an existing instance without creating a new one.
• General cleanup of code, documentation and tests.
• Changed licence from Perl Artistic to the same terms as Perl itself (e.g. Artistic 2.0/GPL)

#------------------------------------------------------------------------ # Version 1.03 Date: 1999/01/19
#------------------------------------------------------------------------

• Incorporated patches from Andreas Koenig to inline calculation of $instance variable. This results in a speedup of around 35%.
• Added newinstance() 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.

#------------------------------------------------------------------------ # Version 1.02 Date: 1998/04/16
#------------------------------------------------------------------------

• Fixed minor typos and corrected example in documentation.

#------------------------------------------------------------------------ # Version 1.01 Date: 1998/02/10
#------------------------------------------------------------------------

• Minor documentation changes

#------------------------------------------------------------------------ # Version 1.00 Date: 1998/02/10
#------------------------------------------------------------------------

• Initial revision