Add Flask.

[barik]

In the branch tbarik/flask, I've added a simple server.py that runs a Flask server on port 5000. We should modify this to add another app route that calls the PyMacer functionality directly. We should be able to then test this route as an HTTP request using a tool like Insomnia.

This can be done with base Flask, without needing flask-restful.

From looking at Brain.py, this looks like mostly calling repairProgram at the REST endpoint.