Changes for 0.30    Tue Sep 19 15:31:32 CEST 2006
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*   Add callback possibilities to Object::Accessor.
    Also note these do not work for lvalue objects
    due to the nature of 'lvalue' in perl. See 
    perldoc perlsub for details, or the CAVEATS
    section in the documentation.

Changes for 0.21    Sat Aug 12 21:42:05 CEST 2006
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*   Correct implementation of lvalue object 
    accessors.