OWL2Perl-0.97

Changes for version 0.97

THIS RELEASE requires that you re-generate all of your OWL2Perl modules!
fix: when bnodes with properties were added to a class, they had extra stuff being added as well.
fix: some ontologies caused owl2perl to serialize very slowly; modified owl-class.tt to speed up _get_statements.
added a method called clear_statements that removes the statements generated when you use OWL::Utils::serialize or _get_statements.
fix: when parsing ontologies, we ignore restrictions that dont act on specific (declared) properties.
fix: when some classes were generated, they had the same property added greater than once. Duplicates should be filtered out now.
added a 'strict' paramter to OWL::Data::OWL::Class that enables/disables constraint checking (defaults to false)
added a 'model' parameter to generated classes that is of type RDF::Core::Model. This model is populated in calls to get_statements.
removed 'statements' parameter from generated classes.
internal subroutine '_get_statements' now returns an RDF::Core::Enumerator object
better handle of OWL classes that are equivalent to anonymous classes with someValueFrom restrictions.
Utils->serialize() updated to use our RDF::Core::Enumerator rather than an arrayref of statements
Updated the perldoc for generated classes
added a __properties method that keeps track of the object and datatype properties that a particular class has. This information is kept in a hash with keys: datatypes and objects;
TODO - cardinality constraints are now broken for classes that declare the same property > once.