* [LOD_CACHE_EGOGRAPH,NEW] Reimplemented assert_egograph/[1,2] so that it now uses cached graphs, if available.
* [LOD_CACHE_STEP,NEW] Reimplemented a big part of lod_cache_step/[2,3], now employing all three LOD cache methods simultaneously, i.e. SPARQL+dump+deref.
* [LOD_CACHE_STEP,O] lod_cache_step/2, which does not return resources but only propositions, is now much faster.
* [SPARQL_CACHE_STEP,O] sparql_cache/2, which does not return resources but only propositions, is now much faster.