Added Eclipse legal docs and added Sparkplug doc chapters. Fixes eclipse-sparkplug#8

Signed-off-by: wes-johnson <[email protected]>

Author: wes-johnson

CONTRIBUTING.md

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+# Contributing to Sparkplug Specification Project
+
+Thanks for your interest in this project.
+
+## Project description
+
+Define an MQTT Topic Namespace
+
+* https://projects.eclipse.org/projects/iot.sparkplug
+
+## Developer resources
+
+Information regarding source code management, builds, coding standards, and
+more.
+
+* https://projects.eclipse.org/projects/iot.sparkplug/developer
+
+The project maintains the following source code repositories
+
+* https://github.com/eclipse/sparkplug
+
+## Eclipse Development Process
+
+This Eclipse Foundation open project is governed by the Eclipse Foundation
+Development Process and operates under the terms of the Eclipse IP Policy.
+
+## Specifications
+
+This specification project operates under the terms of the Eclipse Foundation
+Specification process.
+
+* https://eclipse.org/projects/dev_process
+* https://www.eclipse.org/org/documents/Eclipse_IP_Policy.pdf
+* https://www.eclipse.org/projects/efsp/
+* https://www.eclipse.org/legal/efsp_non_assert.php
+
+## Eclipse Contributor Agreement
+
+Before your contribution can be accepted by the project team contributors must
+electronically sign the Eclipse Contributor Agreement (ECA).
+
+* http://www.eclipse.org/legal/ECA.php
+
+Commits that are provided by non-committers must have a Signed-off-by field in
+the footer indicating that the author is aware of the terms by which the
+contribution has been provided to the project. The non-committer must
+additionally have an Eclipse Foundation account and must have a signed Eclipse
+Contributor Agreement (ECA) on file.
+
+For more information, please see the Eclipse Committer Handbook:
+https://www.eclipse.org/projects/handbook/#resources-commit
+
+## Contact
+
+Contact the project developers via the project's "dev" list.
+
+* https://accounts.eclipse.org/mailing-list/sparkplug-dev

NOTICE

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+# Notices for Sparkplug Specification Project
+
+This content is produced and maintained by the Sparkplug Specification Project
+project.
+
+* Project home: https://projects.eclipse.org/projects/iot.sparkplug
+
+## Trademarks
+
+ Sparkplug Specification Project is a trademark of the Eclipse Foundation.
+
+## Copyright
+
+All content is the property of the respective authors or their employers. For
+more information regarding authorship of content, please consult the listed
+source code repository logs.
+
+## Declared Project Licenses
+
+This program and the accompanying materials are made available under the terms
+of the Eclipse Public License v. 2.0 which is available at
+https://www.eclipse.org/legal/epl-2.0.
+
+SPDX-License-Identifier: EPL-2.0
+
+## Source Code
+
+The project maintains the following source code repositories:
+
+* https://github.com/eclipse/sparkplug
+
+## Third-party Content
+
+This project leverages the following third party content.
+
+None
+
+## Cryptography
+
+Content may contain encryption software. The country in which you are currently
+may have restrictions on the import, possession, and use, and/or re-export to
+another country, of encryption software. BEFORE using any encryption software,
+please check the country's laws, regulations and policies concerning the import,
+possession, or use, and re-export of encryption software, to see if this is
+permitted.

specification/Sparkplug.adoc

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 _Version 2.2_
 
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 Copyright © 2019 Eclipse Foundation, Inc. https://www.eclipse.org/legal/efsl.php
 _Sparkplug™ and the Sparkplug™ logo are trademarks of the Eclipse Foundation_
 
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 |*Revision Number* |*Date* |*Author* |*Description*