Pages behind a login are no longer turned away before they load

Fix Content Players

This finishes the work on pages behind a login that Screenly renders on its own servers, which we started earlier this month.

Some of those pages were still being turned away rather than loaded, so the screens showing them displayed nothing at all. A blank screen is harder to work out than a login page, because there is nothing on it to tell you what went wrong.

Those pages are captured and reach the screen now.