message: Update README.md
  Add new links and descriptions about Tensorflow. The reasons is to make it more user-friendly and provide more informations to all the users so that they can get the informations quickly and learn more faster.
diff: @@ -22,6 +22,8 @@ organization for the purposes of conducting machine learning and deep neural
  networks research. The system is general enough to be applicable in a wide
  variety of other domains, as well.
  +TensorFlow provides stable Python API and C APIs as well as without API backwards compatibility guarantee like C++, Go, Java, JavaScript and Swift.
  +
  Keep up to date with release announcements and security updates by
  subscribing to
  [announce@tensorflow.org](https://groups.google.com/a/tensorflow.org/forum/#!forum/announce).
  @@ -105,9 +107,12 @@ The TensorFlow project strives to abide by generally accepted best practices in
  * [TensorFlow Website](https://www.tensorflow.org)
  * [TensorFlow White Papers](https://www.tensorflow.org/about/bib)
  * [TensorFlow YouTube Channel](https://www.youtube.com/channel/UC0rqucBdTuFTjJiefW5t-IQ)
  +* [Tensorflow Twitter](https://twitter.com/tensorflow)
  +* [Tensorflow Blog](https://medium.com/tensorflow)
  * [TensorFlow Model Zoo](https://github.com/tensorflow/models)
  * [TensorFlow MOOC on Udacity](https://www.udacity.com/course/deep-learning--ud730)
  * [TensorFlow Course at Stanford](https://web.stanford.edu/class/cs20si)
  +* [TensorFlow Roadmap](https://www.tensorflow.org/community/roadmap)
  Learn more about the TensorFlow community at the [community page of tensorflow.org](https://www.tensorflow.org/community) for a few ways to participate.
  