[#292] move to EPL 2.0

[#293] create CONTRIBUTING.md
Signed-off-by: Christian Dietrich <[email protected]>

CONTRIBUTING.md

@@ -0,0 +1,15 @@
+Contributions are 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

Jenkinsfile

@@ -1,9 +1,10 @@
 /*******************************************************************************
  * Copyright (c) 2012-2017 TypeFox GmbH and itemis AG.
- * 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
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *   Moritz Eysholdt - Initial contribution and API