update readme with new timings
update readme with new timings

brunoro/clnn,szagoruyko/clnn,brunoro/clnn,szagoruyko/clnn,szagoruyko/clnn,hughperkins/clnn,hughperkins/clnn,hughperkins/clnn,szagoruyko/clnn,brunoro/clnn,brunoro/clnn,hughperkins/clnn