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/doc/APIconstructors.html b/doc/APIconstructors.html
index 74f6fc9..7625556 100644
--- a/doc/APIconstructors.html
+++ b/doc/APIconstructors.html
@@ -480,6 +480,7 @@
 <a href="html/libxml-xmlschemas.html#xmlSchemaNewMemParserCtxt">xmlSchemaNewMemParserCtxt</a><br />
 <a href="html/libxml-xmlschemas.html#xmlSchemaNewParserCtxt">xmlSchemaNewParserCtxt</a><br />
 </p><h2>Type xmlSchemaPtr:</h2><p><a href="html/libxml-xmlschemas.html#xmlSchemaParse">xmlSchemaParse</a><br />
+</p><h2>Type xmlSchemaSAXPlugPtr:</h2><p><a href="html/libxml-xmlschemas.html#xmlSchemaSAXPlug">xmlSchemaSAXPlug</a><br />
 </p><h2>Type xmlSchemaTypePtr:</h2><p><a href="html/libxml-xmlschemastypes.html#xmlSchemaGetBuiltInListSimpleTypeItemType">xmlSchemaGetBuiltInListSimpleTypeItemType</a><br />
 <a href="html/libxml-xmlschemastypes.html#xmlSchemaGetBuiltInType">xmlSchemaGetBuiltInType</a><br />
 <a href="html/libxml-xmlschemastypes.html#xmlSchemaGetPredefinedType">xmlSchemaGetPredefinedType</a><br />