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_capi.py b/Lib/test/test_capi.py
index d01d3bf..fc31760 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -2,7 +2,7 @@
 # these are all functions _testcapi exports whose name begins with 'test_'.
 
 import sys
-import test_support
+from test import test_support
 import _testcapi
 
 for name in dir(_testcapi):