Changes

Adding required legal documents
Per documentation at
https://github.com/eclipse-ee4j/ee4j/wiki/How-to-release-the-first-Eclipse-version-of-projects 
Contents generated from
https://www.eclipse.org/projects/tools/documentation.php?id=ee4j.websocket
Signed-off-by: Joakim Erdfelt <joakim.erdfelt@gmail.com>