First pass at using rdf-reasoner, instead of built-in entailment rules to do graph expansion.
[CI skip]
Use rdf-reasoner for vocabulary expansion. This generates many more triples, so test using SPARQL rather than graph isomorphism.

* Works with built-in vocabularies, doesn't load vocabularies at this point.
Dynamically load vocabularies.
Use RDF.rb vocabularies, but built-in entailment rules, rather than reasoner.
Version 1.1.5.
Release 1.1.5

* Use RDF.rb vocabularies, but built-in entailment rules, rather than reasoner.
* Dynamically load vocabularies.