get rit of the method duplicated by getTaxonomyQuietly
log level tweak
use the central seed
the base incremental tests generalized to be easily subclassed from the
OWL API and CLI packages
fixed a concurrent modification bug in the taxonomy state: one can't
iterate over a node's members and remove some class at the same time
basic incremental tests now work via the OWL API
clean-up
the random walk incremental tests generalized
OWL API-based implementation of the random walk test
some javadocing for the new test classes