* [DCG_GENERIC,NEW] Added dcg_apply//2, dcg_list//[3,4] (the latter seem overly specific).
* [DOC] Gave README file the Markdown extension.
* [RFC_2396,SC] Cleaned up several DCG rules (shorter code).
* [SVG,SC] Removed DCG-related code, as well as the attribute checks and the generation predicates for line and circle.
* [SVG_ATTRIBUTES,NEW] New module containing DCGs for the SVG attributes.
* [SVG_DATATYPES,NEW] New module containing DCGs for the SVG datatypes and parameters.
* [SVG_DCG,EXT] Split svg_fragment//1 into svg_fragment_base//2 and svg_fragment_nonbase//2.
* [XML_DCG,NEW] Added xml_attribute//3 and xml_inject_attributes/[3,4].