warning fix
- Update theme version number to 3.33, which is the same of the beamer version. The version warning could be suppressed by doing so.
The files are as usual.
- If you know how to install a beamer theme, PolyU-beamer-theme.zip is the pure theme files, and you can install it in your system or user LaTeX folder.
- If you are not so sure about this theme, you may try example-with-local-theme.zip. You don't have to install it, while you can try it in a local folder.