Summary: Wrapping console to send all console.logs to stderr, as we are planning to use stdout for the actual data. By default only console.error messages are logged. I will add a `-v` argument to show all. Also, displaying some ASCII-art and the version number when starting flipper CLI. Reviewed By: passy Differential Revision: D13843675 fbshipit-source-id: acaa70d16f12965a8426abca506049dbafb7962c