* [DEB] Temporarily disabled Prolog pack installation (the VU server is down for 2 days, so this slows down Prolog startup too much).
* [RDF_GRAPH,NEW] Added rdf_graphs_to_graph/2.
* [RDF_GRAPH_NAME,FIX] Hack for the bug in rdf_graph_create/1.
* [RDF_META,SC] Rewrote the loading of RDF files into temporary RDF graphs for setup-call-cleanup-like processing.
* [RDF_SERIAL,NEW] Added rdf_loads/2 for loading several RDF files into the same RDF graph.
* [RDF_SERIAL,EXT] No longer be silent about messages during RDF loading.
* [RDF_SERIAL,EXT] No longer register XML namespace prefixes when loading RDF.
* [RDF_SERIAL,FIX] There is no support for saving in N-triples serialization. This is now explicit in the code.
* [RDF_SERIAL,DOC] Documented options used for saving Turtle files.
* [RDFS_VOC,DOC] Documented load_rdfs_vocabulary/1.