Add pull-request-template and code-of-conduct

Description:
- added the pull request template so it's easier to understand
the scope or PRs as well as how to test them.
- added the code-of-conduct from Eclipse, present from the main repository.

Signed-off-by: vince-fugnitto <[email protected]>

Author: vince-fugnitto

.github/PULL_REQUEST_TEMPLATE.md

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+<!--
+Thank you for your Pull Request. Please provide a description and review
+the requirements below.
+
+Contributors guide: https://github.com/theia-ide/theia/blob/master/CONTRIBUTING.md
+-->
+
+#### What it does
+<!-- Include relevant issues and describe how they are addressed. -->
+
+#### How to test
+<!-- Explain how a reviewer can reproduce a bug, test new functionality or verify performance improvements. -->
+
+#### Review checklist
+
+- [ ] as an author, I have thoroughly tested my changes and carefully followed [the review guidelines](https://github.com/theia-ide/theia/blob/master/doc/pull-requests.md#requesting-a-review)
+
+#### Reminder for reviewers
+
+- as a reviewer, I agree to behave in accordance with [the review guidelines](https://github.com/theia-ide/theia/blob/master/doc/pull-requests.md#reviewing)

CODE_OF_CONDUCT.md

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+
+
+<div id="theia-logo" align="left">
+    <br />
+    <img src="https://raw.githubusercontent.com/eclipse-theia/theia/master/logo/EF_GRY-OR_svg.svg?sanitize=true" alt="Eclipse Logo" width="300"/>
+</div>
+
+# Community Code of Conduct
+Version 1.0
+June 23, 2015
+
+As members of the Eclipse community, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation, submitting code reviews, pull requests, patches, and other activities.
+
+We are committed to making participation in the Eclipse community a harassment-free experience for everyone, regardless of level of experience, gender, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, ethnicity, age, religion or analogous grounds.
+
+Examples of unacceptable behavior by participants include the use of sexual language or imagery, derogatory comments or personal attacks, trolling, public or private harassment, insults, or other unprofessional conduct.
+
+Eclipse Foundation staff 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. Project leaders, committers and contributors who do not follow the Code of Conduct may be removed from the project.
+
+This code of conduct applies within Eclipse project spaces, or in public spaces when an individual is representing the project or the Eclipse community.
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by emailing the Eclipse Management Organization: [email protected].
+
+This Code of Conduct is adapted from the Contributor Covenant (http://contributor-covenant.org), version 1.1.0, available at http://contributor-covenant.org/version/1/1/0/
+
+
+<div id="theia-logo" align="left">
+    <br />
+    <img src="https://www.eclipse.org/images/Eclipse_Code_of_Conduct.png" alt="Eclipse Logo" width="150"/>
+</div>
+
+----
+Note: Please see [here](https://www.eclipse.org/org/documents/Community_Code_of_Conduct.php) for the latest version of this document, hosted at the Eclipse Foundation