Fix for IIPServer style urls when using DZI.
Fix for IIPServer style urls when using DZI.

lidasong2014/openseadragon,goofwear/openseadragon,shaunstanislaus/openseadragon,goofwear/openseadragon,Iced-Tea/openseadragon,daverome/openseadragon,Iced-Tea/openseadragon,LarissaSmith/openseadragon,lidasong2014/openseadragon,jmnetus/openseadragon,msalsbery/openseadragon,TMUND/openseadragon,mcanthony/openseadragon,rdlester/openseadragon,msalsbery/openseadragon,openseadragon/openseadragon,ricochet2200/openseadragon,LarissaSmith/openseadragon,ricochet2200/openseadragon,openseadragon/openseadragon,daverome/openseadragon,mcanthony/openseadragon,jmnetus/openseadragon,rdlester/openseadragon,shaunstanislaus/openseadragon,avandecreme/openseadragon,seanich/openseadragon,TMUND/openseadragon,avandecreme/openseadragon,seanich/openseadragon