Add a notice for using --virgin when necessary
LoggingCardTerminal: make it more flexible

 * Allow to specify the output stream for log messages (default: System.out)
 * Allow to write APDU-s to a dump file similar to what apdutool uses
gp: returned APDU-s can be dumped to a file with --dump
Replay APDU-s from a previously dumped file with -replay <dump>