clean-up: property prefixes "sesame.repo.contexts.*" changed into
"sesame.contexts.*"
added possibility to enable and configure RDF dumps via
sesame.rdf_dump.<serializer key>=<filename>
ignore /target/ subdirectory
Merge branch 'feature/file_dumps' into develop
release 0.1.4
Merge branch 'release/0.1.4' into develop