Rob

Pull request for an initial implementation of streamlined API's for Amazon Sagemaker. Includes 3 functions: "fit", "deploy", and "predict". The primary algorithms this was built around were [XGBoost](https://docs.aws.amazon.com/sagemaker/latest/dg/xgboost.html) and [Linear...

**Summary** After experimenting with some other frontends for Metadata service ingress, supporting basic auth as a client-side communication mechanism seems like a worthwhile exercise. The implementation is just the addition...