TensorFlow Hub 0.4.0

Release 0.4.0

• hub.KerasLayer (for Hub/TF2 modules) can be used in graph mode
  and can be converted to/from a Keras config.
• In TF1.x, hub.Module can be used inside a defun (helps with TPU).
• References to TensorFlow Estimator correctly pick up its v1 API.