* Updated tox to test only python{2,3}.7 and djagno1.11/2.2
* Updated travis.
* Updated models/migrations.
* Updated path to `reverse`
* Updated path to login view.
* Updated middlewares/installed apps
* Updated .travis again.
* Lets see if that will get tests working in python3 on travis.
* Switch to in memory DB for tests
* Stop running tests with python2.7 and django 2.2. They shouldn't work anyway.
* Sure did that wrong. Fix which python versions are running with which code.
* That isn't needed. Lets see if that is what is breaking python3.
* Testing a theory.
* Revert "Testing a theory."
This reverts commit 69b3e4c906.
* Added initial migration for example users.
* is_authenticated is a bool, not a method.
* refs #1: Updated tox + travis.
* refs #1; Fixed path to register.
* refs #1: Updated urls.py
* refs #1: Added username field. Not really sure why it was needed, but whatever.
* Added an update note.
* refs #2: Updated travis.
* refs #2: Updated command to run tests.
* refs #2: Added a test showing permission_required is busted.
* refs #2: Custom user modal needs a default manager.
* refs #2: Updated settings.
* refs #2: Stop the exception from being raised.
* refs #2: Fixed a problem with named parameters.
Fixed legacy permission name "approve_permission_requests".
Fixed forms to not bypass validation for permission requests.
Combined the templates for permission requests forms and permission forms in one file.
Added ability to withdraw a permission request, along the lines of the permission denial.
Updated URLs to be more awesome.
Refactored template tags to be classbased, easier to use.
Changed signature of permission_form templatetag and added ability to pass a template name with which the form should be rendered.
Combined permission_form and permission_request_form in one template tag class.
Added utility to determine best URL to redirect to after successful permission (request) creation.
Made sure the new GET access to the permission form views is secure. Please test!
Added new "approve_permissions" admin action to easily approve permissions in the admin.
Updated default templates to use the new features.
Now dance.
