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_netrc.py b/Lib/test/test_netrc.py
index 2cf1ae4..034b105 100644
--- a/Lib/test/test_netrc.py
+++ b/Lib/test/test_netrc.py
@@ -1,5 +1,6 @@
 
-import netrc, os, tempfile, test_support, unittest
+import netrc, os, tempfile, unittest
+from test import test_support
 
 TEST_NETRC = """
 machine foo login log1 password pass1 account acct1