* check-relaxng-test-suite.py relaxng.c: more testing on the
  Relax-NG front, cleaning up the regression tests failures
  current state and I forgot support for "mixed":
  found 373 test schemas: 280 success 93 failures
  found 529 test instances: 401 success 68 failures
* tree.c include/libxml/tree.h xmlschemastypes.c: finished and
  moved the Name, NCName and QName validation routine in tree.c
* uri.c: fixed handling of URI ending up with #, i.e. having
  an empty fragment ID.
* result/relaxng/*: updated the results
Daniel