Django 1.6 support

* django1.6:
  reference the changes to Django 1.6's password_reset_confirm view
  Test on Django 1.6
  New password reset uses base 64
  UNUSABLE_PASSWORD was removed in Django 1.6

Conflicts:
	CHANGES
The PasswordResetCompleteView wasn't calling resolve_url on login_url.

This was making it impossible to use a named url as your LOGIN_URL
setting.