Updated changelog for 1.0.0 release
Updated changelog for 1.0.0 release

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