Something is broken with password-resetting

Building a test to reproduce the issue (already hitting the first problem).
Will do further testing and fixes in this branch.
Further up the test-road

Running this with Django1.5.5 works here. The test reaches the page congratulating to the new password and showing a link to "Log in". Unfortunately that link leads to an invalid url '/accounts/login' by default:-( But thats probably stuff for a different Issue/PR.
fix for the python3 problem?
Make the urls version-dependant.

This feels a bit dirty. But it could actually work.
Python3 fixes.

Don't know if this is correct, its my first actual encounter with python3;-)
When testing, do so in english.

And follow any language-redirects should these occure.
Added mezzanine-grappelli and mezzanine-workout to thrid party apps in README.
Merge
Better uidb64 password reset version check.
Added Arnold Krille to AUTHORS.
pep8 fix
Fix the fix for reversing the change password form when multiple langages are enabled in the admin.
Provide a warning on admin login when the default password is being used.
Bump grappelli version to 0.3.6