title: How to output logging.info and logging.debug to console?
body: <p>I can only see warning and error, how can I get info and debug printed out? To clarify, I am starting the tornado app with <code>python app.py</code>. I want the info and debug logs to print out to the console after I run the app. </p>
  
  <pre><code>class MainHandler(tornado.web.RequestHandler):
      def get(self):
          self.write('hello fun fun test world from tornado super')
          logging.info('info')
          logging.warning('warning')
          logging.error('error')
          logging.debug('debug')
  
  
  application = tornado.web.Application([(r"/", MainHandler)], debug=True)
  </code></pre>