preparing to make testsuite releases along with code source releases fixed

* xstc/Makefile.am README README.tests Makefile.tests Makefile.am:
  preparing to make testsuite releases along with code source releases
* gentest.py testapi.c: fixed a couple of problem introduced by
  the new Schemas support for Readers
* xpath.c: fixed the XPath attribute:: bug #309580, #309864 in a crude
  but simple way.
* xmlschemas.c include/libxml/tree.h: fixed a couple of problems
  raised by the doc builder.
* doc/*: made rebuild
Daniel
diff --git a/README.tests b/README.tests
new file mode 100644
index 0000000..eb7223d
--- /dev/null
+++ b/README.tests
@@ -0,0 +1,29 @@
+                       README.tests
+
+   Instructions for standalone test regressions of libxml2
+
+libxml2-tests-$version.tar.gz contains 3 standalone C programs as well
+as a large amount of tests and results coming from libxml2 itself and
+from W3C, NIST, Sun Microsystems, Microsoft and James Clark. Each C
+program has a different testing purpose:
+
+  runtest.c : runs libxml2 basic internal regression tests
+  runsuite.c: runs libxml2 against external regression tests
+  testapi.c : exercises the library public entry points
+
+The command:
+
+  make -f Makefile.tests
+
+should be sufficient on an Unix system to build and exercise the tests
+for the version of the library installed on the system. Note however 
+that there isn't backward compatibility provided so if the installed
+version is older to the testsuite one, failing to compile or run the tests
+is likely. In any event this won't work with an installed libxml2 older
+than 2.6.20.
+Building on other platfroms should be a matter of compiling the C files
+like any other program using libxml2, running the test should be done
+simply by launching the resulting executables.
+
+Daniel Veillard
+Sun Jul 10 2005