Return False for is_flagged(anonymous_user)

[bioworkflows]

explained in #12

[idlesign]

Thank you. There's a note though.

[coveralls]

Coverage increased (+0.07%) to 95.0% when pulling c8b9472 on bioworkflows:master into 04cbf97 on idlesign:master.

[idlesign]

A test case would be nice too.

[BoPeng]

I did not add a test because pytest-django does not have a fixture directly for anonymous user. Do you have an easy way to create an anonymous user?

I guess it is easiest just create an AnonymousUser instance from django.contrib.auth.models.

[bioworkflows]

Used is_anonymous and added a test.

[idlesign]

I did not add a test because pytest-django does not have a fixture directly for anonymous user.

But this project doesn't use pytest-django.
pytest-djangoapp has user_create fixture which accepts anonymous param: https://pytest-djangoapp.readthedocs.io/en/latest/fixtures_users.html#pytest_djangoapp.fixtures.users.user_create

[BoPeng]

Revised to use user_create(anaonymous=True). This PR should be ready to merge.

[idlesign]

Thank you. Merged.