\begin{center}
\end{center}
\begin{figure}
\begin{center}
\includegraphics{images/zint.png}
\vfill
\includegraphics{images/zint-qt.png}
\end{center}
\end{figure}
\hypersetup{
  pdfauthor=Robin Stuart,
  pdfsubject={Zint},
  pdfkeywords={zint,barcode,generator}
}
\thispagestyle{empty}