minimalKB v.0.4.0

Main new features:

- fixed incorrect event dispatching when more than one client
- support statements with limited lifespan
- much extended taxonomy walking (oro-view now works with minimalKB)

minimalKB v.0.3.0

Main changes:

- large rewrite of the query management (still
 far from complete, though).
- as a consequence, better handling of complex queries like: [?a desires ?b, ?b type Action]
- existence check can now handle any pattern
- support of OWL/RDF/turtle/n3 loading when RDFlib is available
- added basic command-line options

minimalKB 0.2

Main changes:
- addition of a simple RDFS reasoner (supports only rdf:type and
rdfs:subClassOf for now)
- initial work for a RDFlib backend

First release of minimalKB

- only a simple SQLite backend
- run (but do not pass!) all ~300 Dialogs unit-tests, both with pyoro and pykb.