Add RDFParserOutputIterator interface which is both a StreamRDF and an Iterator<T>, add implementations for Triples, Quads and Tuples based on using an ArrayBlockingQueue as a buffer between parser input to the StreamRDF interface and output via the Iterator<T> interface

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1437937 13f79535-47bb-0310-9956-ffa450edef68