first pass

requires
https://github.com/discoverygarden/islandora_rest/pull/7
https://github.com/discoverygarden/islandora_solution_pack_manuscript/pull/6
https://github.com/Islandora/islandora_openseadragon/pull/37
Should probably be looking to access `$_GET['islandora_paged_content_page']['PID']`?