DOCBOOK-APPS: XSLT 1.1 chunk stylesheet.

The attached stylesheet does chunking with the XSLT 1.1 draft specs.
It's got a couple of workaround for xsltproc, but it might be useful for
someone. xsltproc doesn't currently support the doctype-public and
doctype-system attributes, I generated a partical patch (which supports
the attributes, but breaks single-file-redirected-stdout). Search the
 archives for
"[xslt] PATCH: xsl:document doctypePublic and doctypeSystem" if you are
interested in the partial patch.

Rob