Tf-shell

Highlights:

- tf-shell depends on tensorflow instead of tensorflow-cpu.
- DpSgdSequential and PostScaleSequential support using accelerators to compute jacobian.

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.10...v0.1.11

Enable pfor in Jacobian computation of tf_shell_ml models.

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.9...v0.1.10

Embedding layers are compatible with tf_shell_ml models.

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.8...v0.1.9

Highlights:

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.6...v0.1.7

Highlights:
- Better support for distributed execution across multiple machines.
- Key caching to avoid regeneration.
- Initial support for Keras models with DP-SGD and post-scale training algorithms (WIP).

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.5...v0.1.6