* [DEB] Load plDev at startup (under debug setting).
* [HTML_PL_GENERIC,SC] Added html_module//1, coming from HTML_PL_TERM.
* [PL_DEV,EXT] Rewrite of the generation of HTML, allowing for extensions in the head and body.
* [PL_PREDICATE,EXT] Generating HTML description of predicate properties now works.
* [RDF_GRAPH_CLOSURE,FIX] Typo in module import.
* [SKOS_BUILD,FIX] Missing module import.