* xmlreader.c include/libxml/xmlreader.h: added new APIs
  for creating reader from sources or reusing a reader with
  a new source, like the xmlReadxx and xmlCtxtReadxxx
* win32/libxml2.def.src doc/libxml2-api.xml doc/apibuild.py
  doc/Makefile.am: regenerated the APIs
* doc/xml.html: applied a patch from Stefan Kost for namesapce docs
Daniel