Complete refactor using protobuff

pb/messages.proto

@@ -0,0 +1,90 @@
+syntax = "proto3";
+package meowlib;
+option go_package = "forge.redroom.link/yves/meowlib";
+
+message PackedServerMessage {
+	string From = 1;
+	bytes Payload = 2;
+	string Signature = 3;
+}
+
+message PackedUserMessage {
+	string From = 1; 
+	string Destination=2; 
+    bytes Payload=3;
+	bytes Signature=4;
+}
+
+message ServerMessage {
+	string Type = 1; 
+	string ServerPubKey = 2 ; 
+	bytes Payload = 3 ; 
+	uint64 ServerReceived = 4 ; 
+	string ServerUuid = 5 ;
+
+    message ConversationRequest {
+        string ccid = 1;
+        string LastUuidOK = 2;
+        bool PublishOnline = 3;
+    } 
+ 
+    message ConversationResponse {
+        repeated string MessageUuids = 1;
+        string SourceIpAddress = 2;
+    }
+
+    repeated ConversationRequest PollRequest = 7; 
+	map<string,ConversationResponse> PollResponse = 8; 
+
+    message PostedMessage{
+        string ccid= 1;
+        repeated PackedUserMessage Messages = 2;
+    }
+	repeated PostedMessage Messages = 9; 
+	string NextServerKey = 10; 
+	string Url = 11; 
+}
+
+message Server {
+    string	Name = 1; 
+    string Description=2; 
+    string PublicKey = 3; 
+    string Url = 4; 
+    int32 ConfidenceLevel = 5; 
+}
+
+message MinimalContact {
+    string name=1;
+    string publicKey=2;
+    repeated Server TrustedServers = 3;
+}
+
+
+message UserMessage {
+ 
+	string Destination = 1; 
+	string From = 2; 
+	string Type = 3; 
+	bytes Data = 4; 
+    message ConversationStatus {
+        string LocalUuid = 1; 
+        uint64 LocalSequence = 2 ;
+        uint64 Sent = 3 ; 
+        uint64 Received = 4; 
+        uint64 Processed = 5; 
+        string NextCcid = 6;
+        bool NextCcidAck = 7; // false when proposing a new id, true for accepting it
+        string NextCcpkey = 8;
+        bool NextKeyCcpkeyAck = 9; // false when proposing a new key, true for accpeting it
+    }
+    ConversationStatus Status = 5;
+
+
+    MinimalContact contact = 6;
+
+    message Group{
+        string name=1;
+        repeated MinimalContact members = 2;
+    }
+    Group group = 7;
+}