more work on the automata interfaces and debug of counted choices added a

* xmlregexp.c xmlschemas.c include/libxml/xmlautomata.h: more work
  on the automata interfaces and debug of counted choices
* test/schemas/* result/schemas/*: added a number of tests
Daniel
diff --git a/result/schemas/choice_0_6 b/result/schemas/choice_0_6
new file mode 100644
index 0000000..ee4ceae
--- /dev/null
+++ b/result/schemas/choice_0_6
@@ -0,0 +1 @@
+./test/schemas/choice_6.xml fails to validate