Comment 2 for bug 726539

First, I fixed the import of the TestCommand class but I am not sure if Jonathan did not remove that part deliberately so that fix might be wrong. Jonathan, if you do not wish to export the TestCommand directly over the testtools package, I would appreciate a quick comment, just to be sure :)

Second, I added a sample 'setup.cfg' file to demonstrate how to use the TestCommand class with distutils and testtools.
`python setup.py test` should run the testtools test suite now.