rotation of image log files implemented

improved rotation of message log files
implement deletion of temp images before start new flow
a little bit code cleaning

code/lib/jomjol_time_sntp/time_sntp.cpp

@@ -124,4 +124,4 @@ static void initialize_sntp(void)
     sntp_setservername(0, "pool.ntp.org");
     sntp_set_time_sync_notification_cb(time_sync_notification_cb);
     sntp_init();
-}
+}