First draft of Whisper messages relaying

whisper/message.go

@@ -0,0 +1,15 @@
+package whisper
+
+type Message struct {
+	Flags     byte
+	Signature []byte
+	Payload   []byte
+}
+
+func NewMessage(payload []byte) *Message {
+	return &Message{Flags: 0, Payload: payload}
+}
+
+func (self *Message) Bytes() []byte {
+	return append([]byte{self.Flags}, append(self.Signature, self.Payload...)...)
+}