Added changelog for #666
Added changelog for #666

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