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_math.py b/Lib/test/test_math.py
index d64024f..5101381 100644
--- a/Lib/test/test_math.py
+++ b/Lib/test/test_math.py
@@ -1,7 +1,7 @@
 # Python test set -- math module
 # XXXX Should not do tests around zero only
 
-from test_support import *
+from test.test_support import *
 
 seps='1e-05'
 eps = eval(seps)