Added pause and "add more" buttons to animation demo
Added pause and "add more" buttons to animation demo

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