* pattern.c include/libxml/pattern.h: changed xmlPatterncompile
  signature to pass an int and not an enum since it can generate
  ABI compat troubles.
* include/libxml/schematron.h schematron.c: adding the new
  schematron code, work in progress lots to be left and needing
  testing
* include/libxml/xmlversion.h.in include/libxml/xmlwin32version.h.in
  Makefile.am configure.in: integration of schematron into the
  build
* xpath.c include/libxml/xpath.h: adding flags to control compilation
  options right now just XML_XPATH_CHECKNS.
Daniel