changed the stats payload

As it turns out there are other citizens of this world, not just the botclient.
So I have properly labeled the payload with a type. This makes the web
front-end less breaky.

protocol.go

@@ -247,7 +247,14 @@ func addPlayer(ws *websocket.Conn) {
 			p.Robots = append(p.Robots, &r)
 		}
 
-		err = websocket.JSON.Send(ws, &convertedStats)
+		statsPayload := struct {
+			Stats map[string]Stats `json:"stats"`
+			Type  string           `json:"type"`
+		}{
+			Stats: convertedStats,
+			Type:  "stats",
+		}
+		err = websocket.JSON.Send(ws, &statsPayload)
 		if err != nil {
 			log.Printf("error sending convertedStats to client: %s", err)
 			websocket.JSON.Send(ws, NewFailure("protocol error: convertedStats"))