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___future__.py b/Lib/test/test___future__.py
index fa8224f..7507aed 100644
--- a/Lib/test/test___future__.py
+++ b/Lib/test/test___future__.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env python
-from test_support import verbose, verify
+from test.test_support import verbose, verify
 from types import TupleType, StringType, IntType
 import __future__