This is my suggested structure:

/readme.html (or index.html)
/catalog.xml (XML catalog for using schemata)
/license.html (your licensing)
/schemas/
   youschemas.xsd
   otherschemas.xsd
   somemodule-0.1/
      module.xsd
/doc/
   index.html (general intro)
   reference/
      index.html (schema reference - xsddoc)
/examples
   guide.html (guide to samples)
   sample1.xml
   sample2.xml
   ...