Copyrightify and licensify

[SVN r27552]

src/python/breadth_first_search.cpp

@@ -1,3 +1,11 @@
+// Copyright 2005 The Trustees of Indiana University.
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//  Authors: Douglas Gregor
+//           Andrew Lumsdaine
 #include <boost/graph/breadth_first_search.hpp>
 #include "graph.hpp"
 #include "digraph.hpp"