Add encryption

[dkahle]

Add encryption for data communicated through the socket to a remote host.

[dkahle]

https://stackoverflow.com/questions/2599791/best-practice-for-secure-socket-connection

[coneill-math]

I assume R has builtin SSH and/or RSA support? Not sure about Macaulay2 though...

[dkahle]

I don't think so; I think we'll need to send the data through a SSH tunnel managed by the OS? Not sure. I think authentication may be a problem, especially if we want to keep this seamless.