* Renamed SPARQLStore package to lowercase.
* SPARQLStore object is now directly importable:
from rdflib_sparqlstore import SPARQLStore
* Made SPARQLStore return real rdflib.query.Result objects
* This means any Query returning only a single variable will still
return a tuple
* Any registered Result serializer can now be used
* serialize(format='python') is not longer required (or supported)
* Fixed context-awareness.
* Fixed SPARQL Update deletes with variables
* Made compatible with SPARQLWrapper 1.5.1