added license notice

Signed-off-by: Jeen Broekstra <jeen.broekstra@gmail.com>

Author: abrokenjester

doc/index.adoc

@@ -29,3 +29,7 @@ include::header.adoc[]
 
 If you are looking for documentation belonging to the (now deprecated) Sesame project, you can go to the http://archive.rdf4j.org/[archive website].
 
+== License
+
+All documentation text is licensed under the terms of the http://creativecommons.org/licenses/by/3.0/[Creative Commons Attribution 3.0 (Unported) license]. All example source code is licensed under the terms of th ehttps://www.eclipse.org/org/documents/edl-v10.php[Eclipse Distribution License (EDL), v1.0].
+