Updated doc/UNITTEST.txt and lib/python/Testing/README.txt to reflect progress...

Updated doc/UNITTEST.txt and lib/python/Testing/README.txt to reflect progress made since UNITTEST.txt was originally written.

doc/CHANGES.txt

@@ -45,6 +45,9 @@ Zope Changes
         text/<foo> types
 
     Bugs fixed
+    
+      - Updated doc/UNITTEST.txt and lib/python/Testing/README.txt to
+        reflect progress made since UNITTEST.txt was originally written.
 
       - Removed Version objects from the add menu. Versions are agreed to be a
         feature that should not be used as it is not well implemented and

lib/python/Testing/README.txt

 The Testing package is a set of shared routines for the Zope unit
-testing framework.   To add a test suite to a Zope package:
+testing framework. From Zope 2.8 these are more easily accessed
+by using the ZopeTestCase package. See ZopeTestCase/doc for more
+information.
+
+
+To use Testing without ZopeTestCase:
 
 1. Make a 'tests' subdirectory.