Files around our APIdoc XML application (i.e. the XML generated by the Generator
instead of Json when generating Apiviewer data).

Files in this directory:

pydoc2qx-xml.xsl    -- XML as generated by Pydoc to APIdoc XML transform
qx-xml2qx-json.xsl  -- APIdoc XML to APIdoc Json transform (what Generator
                       generates by default)
qx-xml.rnc          -- APIdoc XML schema in RelaxNG compact format
qx-xml.rng          -- APIdoc XML schema in RelaxNG normal format (generated
                       from .rnc)
readme.txt          -- this file
