Add this.viewer test.
Add this.viewer test.

seanich/openseadragon,openseadragon/openseadragon,avandecreme/openseadragon,msalsbery/openseadragon,rdlester/openseadragon,jmnetus/openseadragon,jmnetus/openseadragon,LarissaSmith/openseadragon,rdlester/openseadragon,openseadragon/openseadragon,msalsbery/openseadragon,seanich/openseadragon,LarissaSmith/openseadragon,avandecreme/openseadragon