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_zlib.py b/Lib/test/test_zlib.py
index 35bca88..ab1c799 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -1,7 +1,7 @@
 import zlib
-from test_support import TestFailed
 import sys
 import imp
+from test.test_support import TestFailed
 
 try:
     t = imp.find_module('test_zlib')