Adaptations to argument order to allow for maplist-like calls.
[NEW] Calling a goal on a list of inputs, returning all+only those inputs for which the goal failed.
Rewrote the CKAN-2-RDF script to use the above.
Placement of CKAN API predicates in separate module/file.
Adding of RDF-based CKAN API predicates (next to PL-based ones).
Separated RDF from PL conversion in ckan/4.
Add fail_mode for RDF image retrieval.
Fail mode can be used for predicates that are not so important and that are allowed to fail within the greater scheme of things.
FIX: Predicate renaming was not carried through in meta-predicate declarations.
FIX: Percentage calculation.
Integrated existing list_script based on files with the new list script created for CKAN scraping.
Uses two new things:
  1. The new, integrated list script.
  2. THe RDF-based and PL-based CKAN API.
1. Use fail_mode for images.
2. No longer break on optional statements.