GRDDL over XHTML/XML using XSLT parser (name grddl)

## GRDDL over XHTML/XML using XSLT parser (name `grddl`)

A parser for Gleaning Resource Descriptions from Dialects of Languages (GRDDL) which allows reading XHTML and XML as RDF triples by using profiles in the document that declare XSLT transforms from the XHTML/XML content into RDF/XML which is the RDF content.

The parser does not support all the GRDDL styles, for example `dataview:namespaceTransformation`, or perform recursive transformations.