Updated with grammar allowing GRAPH and bare triples, e.g. Turtle as subset of TriG.
Added another Collection as graph name test.
Merged 'develop'.
Added :stream option to writer to produce output from a stream, rather than trying to optimize layout. This is most appropriate for large repositories.
Don't write default triples in {}.
Update for proposed LC version of spec.
Update test suite manifest location and earl results.
Integrate stuff from development.
Finish graphGrammar
Update Writer to not put default graph in {}.
Update RSpec message expectation syntax.