* Update README.md
* Added (temporary) installation guide
* Move usage notice out of README
* Add some words about validation to NOTICE file
* Auto-update copyright year in docs
* Update installation instructions
* Update authors
* Remove binder link from notebook docs
* Renamed quickstart to getting_started
* Add pyglotaran_extras to notebook dependency
* Prettify author list
* Add link to getting-started guide to readme

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Joris Snellenburg <jsnel@users.noreply.github.com>
Co-authored-by: s-weigand <s.weigand.phy@gmail.com>