1.0.0-alpha.3

Added

• Extraction of oboInOwl:consider annotation in RdfXMLParser.
• Extraction of oboInOwl:savedBy annotation in RdfXMLParser.
• Extraction of subsetdef and synonymtypedef as annotation properties in
  RdfXMLParser.
• Support for doap:Version instead of owl:VersionIri for specification
  of ontology data version.
• Proper comparison of PropertyValue classes, based on the lexicographic order
  of their serialization.
• Ontology.dump and Ontology.dumps methods to serialize an ontology in
  obo or obojson format.

Fixed

• Metadata not storing optional description of ID spaces if any.
• Wrong type hints in RelationshipData.equivalent_to_chain.

Changed

• Added type checking to some more property setters.
• Avoid using networkx in Term.subclasses.
• fastobo-derived parsers will not create a new entity if one exists in the
  graph of dependencies already.
• Exposed pronto.warnings and the complete warnings hierarchy.