v3.0.0

Third major version of the library, celebrating 3.5 years of intense SPARQL and OWL-DL development done in our 2.X journey!

(NEW) Reduced memory footprint of RDFGraph and RDFMemoryStore (#269)
(NEW) Reduced memory footprint of RDFResource (#269)
(NEW) Improved performances of Mirella query engine when computing OUTER-JOIN operations
(NEW) Added static facilities for directly sending raw string queries to SPARQL endpoints (#276)
(NEW) Added support for reading and writing TriG dataset format (#277)
(NEW) Added support for this[S,P,O,L] index accessor on RDFGraph (#278)
(NEW) Added support for this[C,S,P,O,L] index accessor on RDFMemoryStore (#278)
(MISC) Moved Semantics to standalone project