Authors in README, and more rationales

The questions of contributing guidelines #36 and deterministric development environment #50 ask for a better documentation of expected steps in the technical and organisational workflows and their overlap. This comes with a need for making regular workflows available through written descriptions.

While the README features a rough guide on how to develop on the project, it does not give many words to revealing the rationale behind. It does not even mention a license #59 (closed) and does not give attribution to the authors.

As a public visitor, I need to find high-level details about the project in its README, in order to discover further documentation and explanations elsewhere.

As a developer of the web site, I need to provide high-level details about the project in the README, in order to document the consensus on how the development is organised and to make it available for third parties.

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• The README file lists its authors