 1) Some commands for creating a lecture title page.
 2) Perhaps add an way of showing photos of the authors and the
    institutes in a convenient way.
 3) Add more artwork.
 4) Add an faq section.
 5) Better color management.
 6) Add miniframes and list of frames.
 7) Add commands for zooming out parts of complex slides.
 8) Make section and subsections breakable in sidebars.
 9) Read .nav only after \begin{document} to support utf8 
    and other font encodings.
