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_zipfile.py b/Lib/test/test_zipfile.py
index 480aeed..57f9a89 100644
--- a/Lib/test/test_zipfile.py
+++ b/Lib/test/test_zipfile.py
@@ -1,6 +1,6 @@
 import zlib # implied prerequisite
 import zipfile, os, StringIO, tempfile
-from test_support import TestFailed
+from test.test_support import TestFailed
 
 srcname = "junk9630"+os.extsep+"tmp"
 zipname = "junk9708"+os.extsep+"tmp"