mxf2raw: print version to stdout if -v|--version used on its own
mxf2raw: print version to stdout if -v|--version used on its own

kierank/bmxlib-bmx,stuarthicks/bmx,xunchangguo/BMX,Limecraft/ebu-bmx,stuarthicks/bmx,xunchangguo/BMX,Limecraft/ebu-bmx,Limecraft/ebu-bmx,kierank/bmxlib-bmx,kierank/bmxlib-bmx,xunchangguo/BMX,stuarthicks/bmx