Support for SFTP

[gitmft]

Does this support SFTP/SSH with SOCKS5? Love the project but I think a sample for SFTP would make it more useful. Thanks much.

[pabloweinx]

It should be so nice to see an example of TLS, cause I'm not able to make it work like a client like Filezilla does. I know is the same that in node-ftp, but since you added the socks supports, this is my life-saver de facto library. I hope you can answer. Thanks so much!