WIP: Control the flow of the script

This merge request depends on MR!6

Increase the logging on the process evolution

Working branch naming .follow the previous pattern.

Use https repository access only, as this will reduce dependencies.

Extend the set of TODOs to describe pending work.

A bit of descendant programming to improve readability.

Improve some nested dictionary accesses.

Manage exceptions seen during executions.

Start the integration of environment variables to the script to define different behaviors.