System requires a user to be logged in before posting an article

After this feature is added, posting of articles will be disabled for non-users. In other words, an individual will have to log in to their account in order to submit an article. This means that anonymous visitors will have very little power to interact with the site. Only when a user is logged will a submit article link be displayed as part of the username toolbar. A visitor who attempts to manually create an article will be redirected to the log in page with an error message.