Auto-generating README of modules

[Andros-Spica]

Content in README.md is largely a duplicate print of contents already in NASSA.yml, except the "Further information" section. This involves an extra redundant task for authors, duplicated information in the module webpage, and could create inconsistencies due to copy-and-pasting text.

We could define an "information.md" also in the module's root, and then auto-generate the README.md file based on a general layout, the module NASSA.yml and then printing the content of "information.md".