About to reimport PGC.
Started scraping Picarta for STCN information... again.

* [SC] Added a debug and load file. Added a gitignore file.
* [STCN] Added a text file listing all the 139.xxx PPN numbers of the STCN.
* [STCN] Added a simple scraper that retrieved the Picarta-stored information on STCN entires (for the PPNs from the text file).
* [PICARTA_QUERY,NEW] Added this new module, containing only the query code that was written several months ago. Made some small adaptations, e.g. scrape links using a DCG grammar, build URIs using the URI library.