Changed date of copyright.

src/docs/asciidoc/bsd_license.adoc

@@ -11,7 +11,7 @@ ifdef::env-github,env-browser[:outfilesuffix: .adoc]
 [source]
 ----
 
-Copyright (c) 2003-2017 jMonkeyEngine
+Copyright (c) 2009-2012 jMonkeyEngine
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without