Update header with new copyright and link to LICENSE.

lib/SOURCE_HEADER

@@ -1,25 +1,5 @@
 //
-// $Id$
-//
 // Getdown - application installer, patcher and launcher
-// Copyright (C) 2004-2010 Three Rings Design, Inc.
-// http://code.google.com/p/getdown/
-//
-// Redistribution and use in source and binary forms, with or without modification, are permitted
-// provided that the following conditions are met:
-//
-// 1. Redistributions of source code must retain the above copyright notice, this list of
-//    conditions and the following disclaimer.
-// 2. Redistributions in binary form must reproduce the above copyright notice, this list of
-//    conditions and the following disclaimer in the documentation and/or other materials provided
-//    with the distribution.
-//
-// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
-// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// Copyright (C) 2004-2013 Three Rings Design, Inc.
+// http://code.google.com/p/getdown/source/browse/LICENSE