Making mapping extensible

[markwhiting]

A goal of this from the start has been to build a system that is very extensible. i.e., someone can bring a new task and add it to the system and have it meaningfully add to our knowledge.

To make sure this is achieved, we should have a documented process for doing that, including any relevant system code and analysis code that should be run to product the update changes.

Below are initial points for this, thought I’m sure we might think about others as we work toward this goal.

This is ready to merge when

• There is clear documentation of how to add a totally new task or new question.
• All code is either in the repo or addressable in a long term location.
• There is a PR process for others to contribute an updated map.