* A new field, "Show in navigation," has been added to page settings. By default pages are shown in navigation. If this is set to "No," then the page can still be accessed by anyone who knows the URL, but it does not show up in standard tab, peer and descendant navigation lists. It still shows up as an ancestor.

* The page loader now passes "orphan: false" when fetching descendants, tabs and peers. "orphan: false" is NOT the default anymore for direct calls to getDescendants.

All tests passing with these changes.