added -u flag for unique; generalized to handle N-Quads, fixed bug that didnt print p when c was printed
recogizing nquads in syntax guesser
Borrowing Pay Level Domain calculation from https://code.google.com/p/ldspider/source/browse/trunk/src/main/java/com/ontologycentral/ldspider/tld/TldManager.java#73 see https://github.com/timrdf/prizms/wiki/pr-whois-domain and https://github.com/timrdf/DataFAQs/wiki/Billion-Triples-Challenge