Merge branch 'JK/coc' into 'develop'

# TNL Code of Conduct

The TNL project welcomes and encourages participation by everyone. Therefore, we have adopted this

code of conduct in order to create an open and welcoming environment for everyone, regardless of

age, body size, disability, ethnicity, gender, level of experience, education, nationality, race,

religion, or sexual identity and orientation. No matter how you identify yourself or how others

perceive you, you are welcome in our community.

## Our standards

1. __Be respectful.__

   Disagreements are inevitable among people in a large and diverse community. Remain respectful of

   differing viewpoints and experiences. Disagreement is no excuse for poor behaviour or personal

   attacks.

2. __Assume good faith.__

   There are many ways to reach the goal of the project, which may differ from your ways. Assume

   that other people are working towards this goal. Keep in mind that the people you communicate

   with may not be native English speakers or may have different cultural backgrounds. Be careful

   in the words that you choose to avoid conflicts and misapprehension.

3. __Be inquisitive.__

   TNL is a large and complex project where nobody knows everything. It is always good to ask

   questions early to avoid problems later. Similarly, offers for help are equally important.

4. __Be collaborative.__

   TNL is built on the work done in other projects and it is in turn used by further projects. When

   you contribute to TNL, be willing to explain to others how it works, so that they can build on

   your work to make it even better.

5. __Try to be concise.__

   Keep in mind that what you write once will be read by many other persons. Try to use a clear and

   concise language, especially when a long explanation is necessary. Try to stay on topic, so that

   the whole discussion can be followed as efficiently as possible.

## In case of problems

While this code of conduct should be adhered to by participants, we recognize that sometimes people

may have a bad day, or be unaware of some of the guidelines in this code of conduct. When that

happens, you may reply to them and point out this code of conduct. However, it should still adhere

to the relevant parts of this code of conduct; in particular, it should not be abusive or

disrespectful. Assume good faith; it is more likely that participants are unaware of their bad

behaviour than that they intentionally try to degrade the quality of the discussion.

Serious or persistent offenders will be temporarily or permanently banned from participating in the

TNL community. Complaints should be made to the maintainers of the TNL project. To find contact

information for these administrators, please see the [project's website](https://tnl-project.org/).

## Attribution

This document has been adapted from several sources, notably the

[Debian Code of Conduct version 1.0](https://www.debian.org/code_of_conduct)

and the [SciPy Code of Conduct](https://scipy.github.io/devdocs/dev/conduct/code_of_conduct.html).

[tutorials]: https://mmg-gitlab.fjfi.cvut.cz/doc/tnl/Tutorials.html

[API]: https://mmg-gitlab.fjfi.cvut.cz/doc/tnl/annotated.html

## Getting involved

The TNL project welcomes and encourages participation by everyone. While most of the work for TNL

involves programming in principle, we value and encourage contributions even from people proficient

in other, non-technical areas.

This section provides several ideas how both new and experienced TNL users can contribute to the

project. Note that this is not an exhaustive list.

- Join the __code development__. Our [GitLab issues tracker][GitLab issues] contains many ideas for

  new features, or you may bring your own. The [contributing guidelines](CONTRIBUTING.md) describe

  the standards for code contributions.

- Help with __testing and reporting problems__. Testing is an integral part of agile software

  development which refines the code development. Constructive critique is always welcome.

- Improve and extend the __documentation__. Even small changes such as improving grammar or fixing

  typos are very appreciated.

- Share __your experience__ with TNL. Have you used TNL in your own project? Please be open and

  [share your experience][contact] to help others in similar fields to get familiar with TNL. If

  you could not utilize TNL as smoothly as possible, feel free to submit a [feature request][GitLab

  issues].

Before contributing, please get accustomed with the [code of conduct][code of conduct].

[GitLab issues]: https://mmg-gitlab.fjfi.cvut.cz/gitlab/tnl/tnl-dev/-/issues

[code of conduct]: CODE_OF_CONDUCT.md

[contact]: https://tnl-project.org/#contact

## Citing

If you use TNL in your scientific projects, please cite the following paper in