Changes to PoddSesameManager
 - add new API method getObjectLabel()
 - modify getObjectTypes() to search in imported ontologies

Changes to test artifacts in api/src/test/resources
- add pre-computed inferred schema ontology files
- rename test artifact basic-2.ttl to basic-20130206.ttl in order to
  avoid confusion with similarly named file in webapp/lib
- change schema imports in basic-20130206.ttl to use version IRIs
display viewed Object's label correctly. Comment out dummy code.