message: Update train.py
  Made explicit HTTPS call
diff: r"""Simple speech recognition to spot a limited number of keywords.
  This is a self-contained example script that will train a very basic audio
  -recognition model in TensorFlow. It can download the necessary training data,
  -and runs with reasonable defaults to train within a few hours even only using a
  -CPU. For more information see http://tensorflow.org/tutorials/audio_recognition.
  +recognition model in TensorFlow. It downloads the necessary training data and
  +runs with reasonable defaults to train within a few hours even only using a CPU.
  +For more information, please see
  +https://www.tensorflow.org/tutorials/audio_recognition.
  It is intended as an introduction to using neural networks for audio
  recognition, and is not a full speech recognition system. For more advanced
  