Add TLS support

[TheHashTableSlasher]

I think it's safe to say this program will only be run on trusted networks, but better safe than sorry, right?

[TheHashTableSlasher]

Note: This would probably require using Java sockets instead of Matlab's tcpclient, since, to the best of my knowledge, Matlab has no SSL/TLS library.

[TheHashTableSlasher]

TLS should be doable for Python clients, but a STARTTLS protocol should be used to keep compatibility with unencrypted (Matlab) clients