* Makefile.am catalog.c xmlcatalog.c include/libxml/catalog.h:
  more work on the XML catalog support.
* parser.c include/libxml/parser.h: small cleanup seems using
  list as a public parameter name can give portability troubles
* trionan.c trionan.h xpath.c include/libxml/trionan.h
  include/libxml/xpath.h include/libxml/Makefile.am: removed
  trionan from the libxml API, added xmlXPathIsInf and xmlXPathIsNaN
  wrappers
Daniel