Changelog for #256
Changelog for #256

@avandecreme, please double-check to make sure I've got it all right!

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