I'd love a --version switch

Hi,

I want to know what version of fluxfontsd I've got. I guess I could've added the version in the exe's name when I installed it but a version switch would be better, IMO, or at least nice to have. Maybe even an `-h` or `--help` or a man page.

If I get time I'll dig into the code myself to do this.

Regards,
yb