Automated aspects of te process of parsing the redactiebladen.

* [STCN] Uncommented the parsing of the redactiebladen to completement the scraping of Picarta.
* [STCN_PARSE,EXT] Turned the number of batches in which to process the redactiebladen and the name of the redactiebladen graph into settings (Prolog facts).
* [STCN_PARSE,EXT] Generalized the parsing of the redactiebladen to an arbitrary number of batches (used to be 4).
* [STCN_PARSE,NEW] Automated the multi-batch processing of the redactiebladen.
* [STCN_PARSE,SC] Shorter code due to the use of the new PGC predicates absolute_file_name_number/4 and rdf_graph_merge/3.