Collective Copyright statement.

svn path=/trunk/theora/; revision=13529

COPYING

-Copyright (C) 2002-2005 Xiph.org Foundation
+This collective work is Copyright (C) 2002-2007 by the Xiph.Org Foundation
+Individual portions may be copyright by individual contributors, and
+are included in this collective work with permission of the copyright 
+owners.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
@@ -11,7 +14,7 @@ notice, this list of conditions and the following disclaimer.
 notice, this list of conditions and the following disclaimer in the
 documentation and/or other materials provided with the distribution.
 
-- Neither the name of the Xiph.org Foundation nor the names of its
+- Neither the name of the Xiph.Org Foundation nor the names of its
 contributors may be used to endorse or promote products derived from
 this software without specific prior written permission.