protoboard: peer IDs should be supplied by the user

[vmatare]

Currently, peers are identified by count, and they are counted simply in the order in which the CreatePeerMessages are processed. This leads to a certain degree of uncertainty as to what peer will have what ID. One idea for a solution would be to give the peers a user-supplied string identifier.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[morxa]

This just bit another group, as they used the wrong peer to send messages.