A Frome

From looking at the TF source for v2.0.0-beta1 [here](https://github.com/tensorflow/tensorflow/blob/8e423e3d56390671f0d954c90f4fd163ab02a9c1/tensorflow/python/training/checkpoint_utils.py#L44) it looks like this should work as a drop-in: ``` reader = tf.train.load_checkpoint(filename) ```