fixed maven warnings
reverse odcs dependency version (reverse-merged from commit 0cb9816ea414525c037df6eaf25f75ff77add36d)
added --verbose option
fixed sameAs writers not being closed
change output serialization implementation to use Sesame instead of Jena
(also fixes sharing of bnode identifiers between batch writes and split
files in future)
removed writing of sameAs triples in batches
cleanup
cleanup & optimization
write ns prefixes to output files