switched back to the previous Relax-NG code base, the derivation algorithm

* relaxng.c: switched back to the previous Relax-NG code base,
  the derivation algorithm need severe constraining code to avoid
  combinatorial explosion. Fixed the problem with Sebastian Rahtz
  TEI based example and other bugs
* result/relaxng/*err: updated the results
* test/relaxng/testsuite.xml: started a new test suite
Daniel
26 files changed