Continuous improvement of centroid predictive models (see #1)

[isms]

Overview

We want to continuously improve the accuracy and reliability of models developed for nodule identification. This is a continuation of #1 and will remain open indefinitely.

Note: Substantive contributions are currently eligible for increased point awards.

Design doc reference:
Jobs to be done > Detect and select > Prediction service

Acceptance criteria

• trained model for identification
• documentation for the trained model (e.g., cross validation performance, data used) and how to re-train it

NOTE: All PRs must follow the standard PR checklist.

[pjbull]

For folks who are interested, see the latest announcement here:
https://concepttoclinic.drivendata.org/newsfeed

There are a limited number of AWS credits available for folks to continue to make progress on these algorithms.