python script to run regression tests against the XML Test suite of

* check-xml-test-suite.py: python script to run regression tests
  against the XML Test suite of W3C/OASis
* SAX.c: fixed a validation bug
* parser.c: fixed 3 errors pointed by the test suite
* doc/buildDocBookCatalog: fixed a typo pointed by drake
* python/Makefile.am: fixed a dependendy
Daniel
diff --git a/doc/buildDocBookCatalog b/doc/buildDocBookCatalog
index 64cf931..513796a 100755
--- a/doc/buildDocBookCatalog
+++ b/doc/buildDocBookCatalog
@@ -51,7 +51,7 @@
     found=`find /usr/share/sgml -name docbookx.dtd`
 fi
 if [ "$found" = "" ] ; then
-    echo could not locate docbookx.dtd drom DocBook XML
+    echo could not locate docbookx.dtd for DocBook XML
     exit 1
 fi