TensorFlow Federated 0.79.0

Release 0.79.0

Major Features and Improvements

• Enable support for models with non-trainable variables in
  tff.learning.models.functional_model_from_keras.

Breaking Changes

• Removed farmhashpy dependency.
• Updated com_github_grpc_grpc to version 1.50.0.
• Moved the TFF repository from https://github.com/tensorflow/federated to
  https://github.com/google-parfait/tensorflow-federated.