Bentoml

* New LightGBM support, contributed by 7lagrange
* LightGBM example notebook: https://github.com/bentoml/gallery/blob/master/lightbgm/titanic-survival-prediction/lightbgm-titanic-survival-prediction.ipynb

* Minor AWS Lambda deployment improvements
* Improved error message when docker or sam-cli not available
* Pinned aws-sam-cli version to 0.33.1

* New improved AWS Lambda support!
* Support uploading large model files to s3 when deploying to AWS Lambda
* Support trimming down the size of bundled python dependencies
* Support setting memory size up to 3008MB for Lambda function
* Support updating Lambda deployment to a newer version of saved BentoService bundle

* Fixed an issue when installing BentoService saved bundle as PyPI package, the setup.py file failed to parse requirements.txt as install_requires filed.

* Improved Clipper.ai deployment support
* Work seemlessly with clipper v0.4.1 release, updated deployment guide
* https://github.com/bentoml/BentoML/blob/master/guides/deployment/deploy-with-clipper/bentoml-clipper-deployment-guide.ipynb
* New S3 based repository
* BentoML users can now save to, load from BentoService bundle on S3 storage and deploy those bundles directly
* Deployment python APIs are now available in Beta
* `from bentoml.yatai.python_api import create_deployment`

* Added Tensorflow SavedModel format support
* Added support for s3 based model repository
* New syntax for BentoServicepack, making it easier to work with multiple models
* Fixed REST API server docker image build issue with new release of gunicorn

* Fixed an issue with loading Fastai model in FastaiModelArtifact, when the basic_learn submodule is not already imported
* Fixed an issue with creating AWS SageMaker deployment, previously it will fail with KeyError in certain condition

* Fixed an issue where SQLAlchemy alembic files are not found in PyPI distribution
* Fixed an issue with SQLAlchemy alembic overwriting BentoML default logging configuration