Zookeeper

🐛 Bugs

- Remove experimental slack optimisation (32)

⚠️ Breaking Changes ⚠️

- Remove epochs argument (28)


👷 Internal Improvements

- Move zookeeper to Larq organisation (30)
- Consolidate CI builds under the Larq organisation (31)

🎉 Features
- Allow spaces between HParam arguments 27

⚠️ Breaking Changes ⚠️
- Add support for preload hook (26)
This changes the interface from `build_train` to `build_train()` or `build_train(preload_function)`.

🎉 Features
- Use `tf.data.Options` to tune input pipeline performance (23)

🎉 Features
- Fall back to parsing hyperparameters as strings (21)
- Add support for shell autocompletions (25)

📖 Documentation
- Create CONTRIBUTING.md file (17, 20)

👷 Internal Improvements
- Test against Python 3.6/3.7 and TF 1.13.1/1.14.0/2.0-beta1 (24)

🐛 Bugs
- Fix recursion error in `__str__` and `__repr__` (19)
- Speedup `__getitem__` and ensure consistent KeyErrors (18)