* Makefile.am configure.in xmldwalk.c xmlreader.c
  include/libxml/Makefile.am include/libxml/xmldwalk.h
  include/libxml/xmlversion.h.in: removing xmldwalk module
  since it got merged with the xmlreader.
* parser.c: cleanup
* win32/libxml2.def.src python/libxml2class.txt doc/libxml2-api.xml:
  rebuilt the API
* python/tests/Makefile.am python/tests/reader7.py
  python/tests/walker.py: adding regression testing for the
  new xmlreader APIs, new APIs for reader creation, including
  makeing reader "walker" operating on preparsed document trees.
Daniel