Release 0.4.1

Fixed the precompiled TensorFlow binaries, and also added the following new features:

• io module:
  • Added support for a new TFRecordWriter.
• ops module:
  • Added a new ops namespace, sparse, that includes all sparse ops.
  • Added support for sparse.reorder and sparse.merge.
  • Added support for parsing TF records.
  • data module:
  • Added support for Dataset.shuffleAndRepeat.
  • optimizers module:
  • Added support for the Adafactor optimizer.
  • Renamed SqrtDecay to RSqrtDecay which is more appropriate.
  • math module:
  • Added support for batchGather.
  • Added support for bitwise ops.
  • rnn module:
  • Simplified the attention mechanisms functionality so that it is now not required to tile memory tensors for beam search outside the beam search decoder.
  • Moved the seq2seq module to a separate repository (that of Symphony Machine Translation).