* [DEB] Load plunit (unit testing).
* [DCG_GENERIC,NEW] Added parse_tree/3 to skip uninstantiated subtrees in tree-term construction.
* [HTTP_DCG,DOC] Added module documentation (sections on concepts, client request, server response).
* [HTTP_DCG,EXT] Added http_url//4, based on the recently added module RFC_2396.
* [RADIX,SC] More public predicates, predicate renamings, etc.
* [RFC_1123,NEW] New module containing a DCG for the RFC 1123 datetime standard (used by HTTP 1.1).
* [RFC_1123,DEB] Added test cases using plunit.
* [RFC_2396,SC] Added many public predicates. This allows HTTP_DCG to use these sub-DCG rules in a new way.
* [RFC_2396,FIX] Fixes to predicate's documentation.