Mention workflow tools (i.e., made for automatization) #159

It might be interesting to mention tools made for automatization to the authors.

As reviewers we are too often seeing the "single run.sh" approach to automatization.
But this is often not robust, not configuration by the reviewers, not parallelizable by the reviewers, and not idempotent (when possible).

Tools such as workflow managers might be worth a mention in the packaging-guide.md.

I am thinking of tools such as Make, Snakemake, CWL, NextFlow, etc

If you are interested, I can try to write a small description and list a few tools.