Add NOTICE.md file.

NOTICE.md

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+# Notices for Eclipse Collections
+
+This content is produced and maintained by the Project Leads and Committers of the Eclipse Collections project.
+
+* Project home: https://projects.eclipse.org/projects/technology.collections
+* Project Leads / Committers: https://projects.eclipse.org/projects/technology.collections/who
+
+## Trademarks
+
+Eclipse Collections is a trademark of the Eclipse Foundation. Eclipse, and the Eclipse Logo are registered trademarks 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 project is made available under the terms of the Eclipse Public License (EPL) v. 1.0 or Eclipse Distribution License (EDL) v. 1.0 which are available at the following locations.
+
+* EPL 1.0: https://www.eclipse.org/legal/epl-v10.html
+* EDL 1.0: https://www.eclipse.org/org/documents/edl-v10.html
+
+SPDX-License-Identifier: EPL-1.0 OR BSD-3-Clause
+
+## Source Code
+
+The project maintains the following source code repositories:
+
+* https://github.com/eclipse/eclipse-collections.git
+* https://github.com/eclipse/eclipse-collections-kata.git
+* https://github.com/eclipse/gsc-ec-converter.git
+* https://github.com/eclipse/www.eclipse.org-collections.git
+* https://github.com/eclipse/collections-website.git