The Git commit checksum has been added to the first slide to help
readers identify any change.

The first version of these slides was presented in a talk I gave at
CRAL on the 9th of February (placed at the end of slides on the
science topic I was talking about). Later, I separated them into an
independent set of slides to help facilitate the discussions I was
having and also to upload on my webpage.

As the concept is evolving, I found my self having to make changes to
the slides, so to keep track of the slides and history of the changes,
I thought of making this repository.