SailGraph.loadRDF: customized with RDFParser and RDFHandler
SailGraph.loadRDF: clarifications for the RDFParser and RDFHandler @joshsh
SailGraph.loadRDF: minor correction to the comment regarding rdfHandler for the default loadRDF
GraphSailConnection: re-using the vertex if the subject is the same as the object.
Merge branch 'SailGraph.loadRDF' of https://github.com/juharris/blueprints
Merge branch 'GraphSail-reuse-vertex' of https://github.com/juharris/blueprints