Added support for URI and XmlGregorianClendar to data types
Added http://protege.org/code#ignore property in the reasoner based
inference implementation to allow ignoring of classes and properties
based on owl model annotations. needs to be copied accross to the
simpleinference implementation as well
added support for cardinality in generated java classes if owl mode is
constrained to have 0..1 instances of a property.
Maven plugin defaults to using Hermit reasoner