Fixed broken 'back' link in Essays template
Fixed the prints page to correctly display the 108 prints in the collection by updating a call to the BDR API and the parsing of its data. Added a provision for displaying unknown authors in the list of pages.
Added the ability to view items sorted by whether or not they are in the Chinea collection or not. Updated the marker for being in the Chinea collection to check the subtitle field (if present). Sorting method is persistent across page views and changes to "sort by".