adding the pattern node selection code. Inheried in part from libxslt but

* pattern.c include/libxml/pattern.h: adding the pattern node
  selection code. Inheried in part from libxslt but smaller.
* Makefile.am configure.in include/libxml/xmlversion.h.in:
  integrated the pattern module, made it a configure time option
* xmllint.c: added --pattern to test when doing --stream
Daniel
7 files changed