* [CKAN,EXT] Added CKAN API object properties.
* [DCG_CONTROL,DCG_GENERIC,SC] Merged modules.
* [RDF_DCG,NEW] New module for parsing and generating RDF terms. Integrate this with RDF_NAME at some point...
* [RDF_HTML,NEW] New module that generates RDF terms in HTML markup.
* [RDF_TABULAR,EXT] RDF Web debug tools now use RDF_HTML.
* [RDF_WEB,SC] Removed RDF web debug tools. Superseded by RDF_HTML.
* [EXT] For RDF datatype predicate we only accept IRIs for datatypes (not datatype names).
* [RDF_DATATYPE,XSD,EXT] Big update for XML Schema Datatypes and RDF datatypes: only accept datatype IRI arguments (no names). only accept/emit code lists (not atoms) for lexical expressions. Cleared up a lot of code.
* [FIX] Argument position for decimal_digit//2 seems to have changed over time. Now corrected in several places.
Added automatic JSON-to-RDF conversion for dataTime, URL.
* [RDF_HTML,FIX] Catch RDF grapth names from the RDF term parser/generator (a hack).

Signed-off-by: Wouter Beek <me@wouterbeek.com>
* [CKAN,EXT] Added properties, types, and whether they are optional or not.