Convert to UTF8, update copyright year, update qboosh email address, fix Usage translation.
Convert to UTF8, update copyright year, update qboosh email address, fix Usage translation.

flatzo/popt,GerHobbelt/POPT,GerHobbelt/POPT,devzero2000/POPT,devzero2000/POPT,flatzo/popt,devzero2000/POPT,GerHobbelt/POPT