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. :)

Lib/test/test_array.py

@@ -3,7 +3,7 @@
    Roger E. Masse
 """
 import array
-from test_support import verbose, TESTFN, unlink, TestFailed,\
+from test.test_support import verbose, TESTFN, unlink, TestFailed,\
      have_unicode, vereq
 
 def main():