Started working on rendering of TOC code, as described here. These are the changes I've made:

• I made substantial edits to Le Bon Mariage, Ville-Thierry and Le Blanc to fix minor inconsistencies and missing attributes.
• I added a special handler for <ref type="pageNum"> which processes a TOC page number into a link to the <fw> containing that page number. Note, though, that none of the <fw> tags in question actually has an @xml:id attribute yet, with the exception of one that I added to Le Bon Mariage for testing. I'll probably try to automate the addition of those attributes.
• I added an appropriate CSS ruleset for the page numbers.

Basically everything seems to be working, although the page width of the Ville-Thierry is still wrong; I need to work on that a little. But someone else will take over the markup of that document at some point, so it could be left to them.