Inclusion of another communication protocol for security

[EduardoLR10]

Summary

As mentioned here, OTP was not made for communication with potentially hostile nodes. Hence, we need to introduce another communication layer, e.g., TCP, UDP, Protobuf etc, to handle initial communication with the server node from the client. To continue to use Zerl, as suggested by @z-silver, we can still send the payload in OTP format, but that within the payload of another protocol.

Observations

• This is a big refactor;
• New libraries on both sides (client and server) will be required;
• Being able to run the Demo is the main criteria for the Definition of Done.