Add netcat mode

[GoogleCodeExporter]

Feature request: add a function found in "DS SaveSender" app (which doesn't 
seem to work for me): instead of trying to connect to an FTP server, it will 
simply connect to a given IP and port and send the raw binary data. Then you 
can receive it by simply running:
nc -l -p 1234 > savefile.sav
and receive the save file without having to run an FTP server.

Original issue reported on code.google.com by [email protected] on 28 Apr 2013 at 3:56