Get rid of relative imports in all unittests.  Now anything that
imports e.g. test_support must do so using an absolute package name
such as "import test.test_support" or "from test import test_support".

This also updates the README in Lib/test, and gets rid of the
duplicate data dirctory in Lib/test/data (replaced by
Lib/email/test/data).

Now Tim and Jack can have at it. :)
diff --git a/Lib/test/test_ntpath.py b/Lib/test/test_ntpath.py
index 4dee1fc..40d785f 100644
--- a/Lib/test/test_ntpath.py
+++ b/Lib/test/test_ntpath.py
@@ -1,5 +1,5 @@
 import ntpath
-from test_support import verbose, TestFailed
+from test.test_support import verbose, TestFailed
 import os
 
 errors = 0