report improvement more tests Daniel

* schematron.c: report improvement
* test/schematron/zvon* result/schematron/zvon*: more tests
Daniel
diff --git a/test/schematron/zvon11_3.xml b/test/schematron/zvon11_3.xml
new file mode 100644
index 0000000..d3ac388
--- /dev/null
+++ b/test/schematron/zvon11_3.xml
@@ -0,0 +1,3 @@
+<AAA>
+     <BBB/>
+</AAA>