Merge pull request #146 from eclipse/mor-recommended-files

Add files recommended by project handbook

CODE_OF_CONDUCT.md

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+# Community Code of Conduct
+
+**Version 1.2
+August 19, 2020**
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as community members, contributors, committers, and project leaders pledge to make participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+With the support of the Eclipse Foundation staff (the “Staff”), project committers and leaders are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project committers and leaders have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies within all project spaces, and it also applies when an individual is representing the Eclipse Foundation project or its community in public spaces. Examples of representing a project or community include posting via an official social media account, or acting as a project representative at an online or offline event. Representation of a project may be further defined and clarified by project committers, leaders, or the EMO.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the Staff at codeofconduct@eclipse.org. All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. The Staff is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project committers or leaders who do not follow the Code of Conduct in good faith may face temporary or permanent repercussions as determined by the Staff.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][https://www.contributor-covenant.org/], version 1.4,
+available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html

CONTRIBUTING.md

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+# How to contribute to Eclipse Xsemantics
+
+First of all, thanks for considering to contribute to Eclipse Xsemantics. We greatly appreciate your help!
+
+## Legal Requirements
+
+Xsemantics is an [Eclipse](http://www.eclipse.org) project and as such is governed by the Eclipse Development process.
+This process helps us in creating open source software within a safe legal framework.
+
+### First Steps
+For you as a contributor, the following preliminary steps are required in order for us to be able to accept your contribution:
+
+* Sign the [Eclipse Foundation Contributor License Agreement](http://www.eclipse.org/legal/CLA.php).
+In order to do so:
+
+  * Obtain an Eclipse Foundation user ID. Anyone who currently uses Eclipse Bugzilla or Gerrit systems already has one of those.
+If you don't already have an account simply [register on the Eclipse web site](https://dev.eclipse.org/site_login/createaccount.php).
+  * Once you have your account, log in to the [projects portal](https://projects.eclipse.org/), select *My Account* and then the *Contributor License Agreement* tab.
+
+* Add your GitHub username to your Eclipse Foundation account. Log in to Eclipse and go to [Edit my account](https://dev.eclipse.org/site_login/myaccount.php).
+
+### File Headers
+We use a common header across all source files. For a new contribution, please add the below header:
+
+```
+/*******************************************************************************
+ * Copyright (c) <year> <legal entity>.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   <legal entity> - <short description of contribution>
+ *******************************************************************************/
+```
+
+Please ensure \<year\> is replaced with the current year or range (e.g. 2021 or 2018-2021).
+Please ensure \<legal entity\> is replaced with the relevant information.
+
+If you are editing an existing contribution, feel free to add your legal entity to the contributors section.
+
+### Signing Off Your Commits
+It is a legal requirement that every commit of an author who is not a member of the project must be "signed off" using
+the same email address used for the user's Eclipse account.
+
+You do this by adding the `-s` flag when you make the commit(s), e.g.
+
+    $> git commit -s -m "Shave the yak some more"
+
+You can find all the details in the [Contributing via Git](http://wiki.eclipse.org/Development_Resources/Contributing_via_Git) document on the Eclipse web site.
+
+## How to Contribute
+
+The easiest way to contribute code/patches/whatever is by creating a GitHub pull request (PR). Submit a PR via the normal GitHub UI.
+
+## After Submitting
+
+Do not use your branch for any other development, otherwise further changes that you make will be visible in the PR.