* doc/api.xsl doc/APIconstructors.html doc/APIfiles.html
  doc/APIfunctions.html doc/APIsymbols.html doc/libxml2-refs.xml
  doc/parsedecl.py doc/Makefile.am: updated the python extractor
  to generate cross-references, and added/updated the stylesheets
  to generate and link API indexes. The generic keyword index
  is not done yet.
* doc/*.html: regenerated all the usual docs too
Daniel