Minor wording change to readme
Minor wording change to readme

rdlester/openseadragon,goofwear/openseadragon,sul-dlss/openseadragon,msalsbery/openseadragon,avandecreme/openseadragon,LarissaSmith/openseadragon,janelia-flyem/openseadragon,rdlester/openseadragon,LarissaSmith/openseadragon,avandecreme/openseadragon,msalsbery/openseadragon,mcanthony/openseadragon,openseadragon/openseadragon,goofwear/openseadragon,janelia-flyem/openseadragon,TMUND/openseadragon,LafayetteCollegeLibraries/openseadragon,openseadragon/openseadragon,ricochet2200/openseadragon,ricochet2200/openseadragon,shaunstanislaus/openseadragon,daverome/openseadragon,TMUND/openseadragon,jmnetus/openseadragon,Iced-Tea/openseadragon,Iced-Tea/openseadragon,seanich/openseadragon,lidasong2014/openseadragon,daverome/openseadragon,shaunstanislaus/openseadragon,mcanthony/openseadragon,seanich/openseadragon,jmnetus/openseadragon,lidasong2014/openseadragon