removed HTML hard page break in fullSplit.xsl

Replaced with an XML processing instruction "soft-break" that can
be used by processing software to split the document into chunks
appropriate for paging.
embed ToC into document in fullSplit.xsl

ToC is no longer created in a separate file, but is embedded into
the main returned document. It can be split off by post-processing
software if necessary (e.g. for insertion into columns.)
always include div.toclist to aid post-processing

If /ead/archdesc/dsc is absent, this div will be empty