Comments can be placed public, but unauthenticated cannot view comments

[arnecoomans]

[x] Create setting in settings.py: "Allow unauthenticated users to read comments" [x] Add setting in context processor [x] Use setting to display "public" in add comment form [x] Use setting to load comments

Result; when "Allow unauthenticated users to read comments" is True, comments can be added with visibility public, and unauthenticated users can read these comments. When "Allow unauthenticated users to read comments" is False, the visibility public is not shown, and comments will not appear, a sign-up or login text is shown in stead.

[arnecoomans]

when this is implemented is has 2 faults:

• when the setting is not defined, the application breaks, add a default value in context_processors
• when the setting is set to False, comments do not load.