hxcfloppyemulator executable should accept filename as argument

[dctucker]

As I'm fine-tuning my Linux environment, I'm attempting to associate all .hfe files with HxC Floppy Emulator so I can quickly open it from my file manager and begin poking around on the floppy image. Unfortunately it seems the executable does not do anything with argv/argc. This could be a relatively low-effort improvement that may also apply to non-Linux versions of the application.

Expected: hxcfloppyemulator disk1.hfe launches the GUI app and automatically loads disk1.hfe Actual: hxcfloppyemulator disk1.hfe does the same thing as hxcfloppyemulator and just launches the GUI app.