Scraping Picarta for STCN data now works in a fully automated way, using a TODO and a DONE text file.

* [STCN,SC] Extracted code that was generic enough to be applicable to other casses as well (see module LIST_SCRIPT in PGC).
* [STCN,FIX] Asserting the at_halt/1 directive all of the sudden makes things work.
* [STCN,DEB] Added stcn_status/0 that shows the progress of the scraping job.
Started a conversion from the old STCN/KMC code to a new version that has the following properties:
** More reusable code. Reduce the number of code lines significantly.
** Use of DCGs as much as possible.
** Use of namespace =stcnv= for properties as well as for classes.
** Clean Picarta-scraped data instead of extracting redactiebladen data (wherever this is possible).
** Fully automated the entire process of STCN conversion.

* [KMC_1200,NEW] Added a DCG for converting literals statements to more explicit ones.
* [KMC_3000,NEW] Added a small DCG for converting literal PPNs to URI PPNs.
* [STCN,NEW] Started adding methods for cleaning STCN data and asserting the STCN schema. Together with scraping Picarta and parsing some KMCs from the redactiebladen this should deliver a fully automated STCN SW conversion process.
* [STCN_KMC,NEW] New module that contains all generic KMC code.
* [STCN_PARSE,SC] Started to relocated code to submodules. Started rewriting old code in DCGs.
* [STCN_SCHEMA,NEW] New module that contains all generic STCN schema code, plus class to the schema's of the individual KMCs.