[nobug]: add contributing and notice files (#125)

Signed-off-by: Lukas Jungmann <lukas.jungmann@oracle.com>

CONTRIBUTING.md

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+# Contributing to EclipseLink
+
+Thanks for your interest in this project.
+
+## Project description
+
+The EclipseLink project's goal is to provide a complete persistence solution
+that is both comprehensive and universal. It will run in any Java environment
+and read and write objects to virtually any type of data source, including
+relational databases, XML, or EIS systems. EclipseLink will focus on providing
+leading edge support, including advanced feature extensions, for the dominant
+persistence standards for each target data source; Java Persistence API (JPA)
+for relational databases, Java API for XML Binding (JAXB) for XML, Java
+Connector Architecture (JCA) for EIS and other types of legacy systems, and
+Service Data Objects (SDO).
+
+* https://projects.eclipse.org/projects/ee4j.eclipselink
+
+## Developer resources
+
+Information regarding source code management, builds, coding standards, and
+more.
+
+* https://projects.eclipse.org/projects/ee4j.eclipselink/developer
+
+The project maintains the following source code repositories
+
+* https://github.com/eclipse-ee4j/eclipselink
+* https://github.com/eclipse-ee4j/eclipselink-workbench
+* https://github.com/eclipse-ee4j/eclipselink-oracleddlparser
+* https://github.com/eclipse-ee4j/eclipselink-examples
+* http://git.eclipse.org/c/eclipselink/eclipselink.releng.git
+* http://git.eclipse.org/c/eclipselink/eclipselink.runtime.git
+* http://git.eclipse.org/c/eclipselink/eclipselink.utils.temp.git
+* http://git.eclipse.org/c/eclipselink/examples.git
+* http://git.eclipse.org/c/eclipselink/examples/mysports.git
+* http://git.eclipse.org/c/eclipselink/examples/nosql.git
+* http://git.eclipse.org/c/eclipselink/examples/performance.git
+* http://git.eclipse.org/c/eclipselink/examples/temporal.git
+* http://git.eclipse.org/c/eclipselink/incubator.git
+* http://git.eclipse.org/c/eclipselink/javax.persistence.git
+* http://git.eclipse.org/c/eclipselink/oracleddlparser.git
+
+This project uses Bugzilla to track ongoing development and issues.
+
+* Search for issues: https://eclipse.org/bugs/buglist.cgi?product=EclipseLink
+* Create a new report:
+   https://eclipse.org/bugs/enter_bug.cgi?product=EclipseLink
+
+Be sure to search for existing bugs before you create another one. Remember that
+contributions are always welcome!
+
+## 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://dev.eclipse.org/mailman/listinfo/eclipselink-dev
+