cleaned up some logging

player.go

@@ -21,8 +21,7 @@ func (p *player) sender() {
 		}
 	}
 	p.ws.Close()
-	// TODO
-	log.Printf("player %s: sender close", p.Robots[0].Id)
+	log.Printf("%s: robot (%s) sender close", p.Id, p.Robots[0].Id)
 }
 
 func (p *player) recv() {
@@ -36,7 +35,7 @@ func (p *player) recv() {
 			// TODO: perhaps we could be a bit more precise in the handling of
 			// this 'error' by selecting on some kill signal channel and this
 			// json read?
-			log.Print("problem receiving JSON from player: ", err)
+			log.Printf("%s: problem receiving JSON from player: %s", p.Id, err)
 			break
 		}
 
@@ -101,6 +100,6 @@ func (p *player) recv() {
 		}
 	}
 
-	log.Printf("player %s: recv close", p.Robots[0].Id)
+	log.Printf("%s: recv close", p.Id)
 	p.ws.Close()
 }