Fix get_statements and count_statements when called with quad patterns with non-nil graph.
Update triple store tests for expected results when passing in quad patterns with non-nil graphs.
Merge branch 'bugfix-triplestore-tests'
Fixed bug in RDF::Trine::Model->size that was only considering triples, not quads.
Merge branch 'master' of https://github.com/kasei/perlrdf