Use the latest version of setuptest

Sadly, Kanisa doesn't work at all on Python 3 - it currently
depends on at least one package that isn't Python 3 ready
(mutagen).
Also run flake8 over everything
Test with tox on Travis
Remove example_project

We use django-setuptest for testing now
Fix trailing whitespace
Fix category management breadcrumbs
Line wrapping
Removing requirements file
Hopefully more readable URL patterns
Ensure the members' area links to the admin area and vice versa
import tidying
Re-order and clean up URLs