Implemented several protocol steps.
- Server loads its certificate and private key (i.e. serverCert.pem and
serverKey.pem in certs/serverCert/, configurable in Common.Settings)
- Server loads trusted CAs and given CA Certificate (i.e. certs in
folder certs/trustStore)
- first INIT messages are passed between client and server, i.e. Client
Nonce is sent and server responds with Nonce and Certificate. All
objects are transmitted as simple byte streams and then reassembled on
the receiver side.

All that should be left to do is complete the protocol with the
remaining messages. :)