* [SC] Cleanup of Prolog support files. New HTML_PL_ERROR,HTML_PL_GENERIC module.
* [HTML_PL_TERM,EXT] Support for class, file, predicates, operators compound terms.
* [HTML_PL_TERM,EXT] Support for string.
* [HTML_PL_TERM,SC] Removed html_nvpairs//1, superseded by html_pairs//2.
* [HTML_TUPLE,NEW] New module, coming from HTML.
* [PAIR_EXT,NEW] Added term_to_pair/2.
* [PL_MODULE,EXT] Better way of generating the rows for the table describing modules.