Merge pull request #61 from VTT-ProperTune/jskortel/fix-things-1

Change file formats and make improvements to documentation

Author: ahojukka5

CONTRIBUTING

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+# Contributing
+
+The OpenPFC software framework is provided as an open-source software to support
+the open science principle. The framework is mainly developed in publicly funded
+research projects, but some maintenance and software development is done as
+voluntary work. We appreciate all the contributions to the software framework,
+whether they are to the code itself or to, e.g., the documentation or examples.
+To keep the framework package in shape, we have to follow certain strict
+practices, such as the contributions are always evaluated by the OpenPFC main
+developers and the copyright of the contribution is transferred to [VTT
+Technical Research Centre of Finland Ltd](https://www.vttresearch.com/en), the
+copyright holder of OpenPFC (see the details below).
+
+## How to contribute
+
+The general steps for contributing to OpenPFC software framework are:
+1. Read at least the files [README.md](README.md),
+   [CONTRIBUTING.md](CONTRIBUTING.md), [LICENSE.md](LICENSE.md), and the
+   documentation in the [docs](docs) directory.
+2. If the contribution is small, e.g., a small fault in the documentation, you
+   can point it out by making an issue.
+3. For larger contributions, you should make your local fork of the OpenPFC
+   repository, make the modifications and/or additions to it, and then make a
+   *pull request*.
+4. To avoid unnecessary work, keep high quality in your coding and document
+   writing, check your text and test your code carefully before your
+   contribution.
+
+## Copyright Transfer
+
+VTT Technical Research Centre of Finland Ltd (VTT) is the sole Copyright Holder
+of *VTT properTune*, including all its parts and modules, e.g., allowing VTT to
+do further sublicensing of (parts of) *VTT properTune* to any party. To make
+this possible, VTT also needs to be the Copyright Holder of new contributions.
+
+Any party making a Contribution to *VTT properTune* also transfers the Copyright
+of the Contribution to VTT. Contributor(s) making a Contribution to *VTT
+properTune* thereby also makes a Transfer of Contribution Copyright. VTT has the
+right to accept or refuse the Contributions.
+
+**This program is provided under the terms of the GNU Affero General Public
+License (AGPL), version 3. Any use, reproduction, or distribution of this
+program constitutes recipient's acceptance of the GNU AGPL version 3.**
+
+"Transfer of Contribution Copyright" means that the Contributor(s) of a
+Contribution transfer the ownership and the copyright of the Contribution to
+VTT, the *VTT properTune* Copyright Holder, for inclusion in *VTT properTune*.
+
+To the best of its knowledge, the Contributor warrants that it/he/she has all
+necessary rights, ownership, and copyright to the Contribution and that the
+Contribution does not infringe any third-party intellectual property rights,
+such as patents, trademarks, or copyrights.
+
+In case the Contributor is an organisation, it confirms that for the purposes of
+this Agreement, it has received all necessary rights from its personnel involved
+on its behalf in making the Contribution. Such transfer may also be executed by
+having this Agreement signed both by the organisation and its personnel involved
+in making the Contribution.
+
+The transfer takes place upon the effective date when the Contribution is made
+available on the web site, by such Contributors themselves or anyone acting on
+behalf of such Contributors. The transfer is free of charge.