update readme
update readme

BenHeubl/dailygraphics,onyxfish/dailygraphics,eads/dailygraphics,BenHeubl/dailygraphics,onyxfish/dailygraphics,swastvedt/dailygraphics,cerealcommas/mashgraphics,cerealcommas/mashgraphics,eads/dailygraphics,cerealcommas/mashgraphics,BenHeubl/dailygraphics,wjcjenny/dailygraphics,nprapps/dailygraphics,onyxfish/dailygraphics,nprapps/dailygraphics,abcnews/dailygraphics,abcnews/dailygraphics,swastvedt/dailygraphics,abcnews/dailygraphics,wjcjenny/dailygraphics,louisstow/dailygraphics,wjcjenny/dailygraphics,abcnews/dailygraphics,louisstow/dailygraphics,stlpublicradio/dailygraphics,swastvedt/dailygraphics,louisstow/dailygraphics,stlpublicradio/dailygraphics,nprapps/dailygraphics,nprapps/dailygraphics,stlpublicradio/dailygraphics,eads/dailygraphics,stlpublicradio/dailygraphics