Rename the extracted boost subdirectory to ndnboost
diff --git a/ndnboost/smart_ptr/detail/sp_forward.hpp b/ndnboost/smart_ptr/detail/sp_forward.hpp
new file mode 100644
index 0000000..d22d9a4
--- /dev/null
+++ b/ndnboost/smart_ptr/detail/sp_forward.hpp
@@ -0,0 +1,39 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  detail/sp_forward.hpp
+//
+//  Copyright 2008,2012 Peter Dimov
+//
+//  Distributed under 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
+
+#include <ndnboost/config.hpp>
+
+namespace ndnboost
+{
+
+namespace detail
+{
+
+#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
+
+template< class T > T&& sp_forward( T & t ) BOOST_NOEXCEPT
+{
+    return static_cast< T&& >( t );
+}
+
+#endif
+
+} // namespace detail
+
+} // namespace ndnboost
+
+#endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_FORWARD_HPP_INCLUDED