pfsshell added to repository

I recently stumbled upon another nifty tool and added it

Another little PS2 tool has been added to my repository: pfsshell. It allows some basic shell-like behavior on PS2 HDDs and works perfect with Open PS2 Loader’s NBD server - just like HDL Dump does. And just like HDL Dump’s new package the manpage is a bit rough and the git repo also lacks proper readme and license files, but it’s up and running. AMD64 packages can be found at the releases page, AMD64 and I386 packages can be installed from my private Debian repository.