* [SPARQL,SC] Use SPARQL_API i.o. SPARQL_EXT everywhere, resulting in shorter code.
* [SPARQL_API,NEW] Replaces SPARQL_EXT as the default way to fire a SPARQL query in Prolog. Distinguishes between ASK, SELECT, and Update.
* [SPARQL_EXT,SPARQL_SAMEAS,SC] Big cleanup of SPARQL_EXT, renamed and now only dealing with closure under identity.