0.4
	- PythonTech::Obj
		Apply qname mapping for rdf:type in has_type

0.3
	- PythonTech::Model
		Fix bug in query
		add pod documentation;
		add optional classifier property
		add refresh method
	- PythonTech::Obj
		Allow colon in GET acquisition e.g. 'p_foo:bar'
		fix isa_* to return 0 if false

0.2
	- PythonTech::Model
		Map with extqmap consistently
		Apply extqmap to predicates
		Add disconnect/reconnect methods
		Add dbqmap and extmap; allow inline config
		Fix reverse qname mapping
		Re-bless when create_obj after as_obj
	- PythonTech::Obj
		Add 'add' method