Rename the extracted boost subdirectory to ndnboost
diff --git a/ndnboost/smart_ptr/detail/lightweight_mutex.hpp b/ndnboost/smart_ptr/detail/lightweight_mutex.hpp
new file mode 100644
index 0000000..a48bb45
--- /dev/null
+++ b/ndnboost/smart_ptr/detail/lightweight_mutex.hpp
@@ -0,0 +1,42 @@
+#ifndef BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+// boost/detail/lightweight_mutex.hpp - lightweight mutex
+//
+// Copyright (c) 2002, 2003 Peter Dimov and Multi Media Ltd.
+//
+// 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)
+//
+// typedef <unspecified> ndnboost::detail::lightweight_mutex;
+//
+// ndnboost::detail::lightweight_mutex is a header-only implementation of
+// a subset of the Mutex concept requirements:
+//
+// http://www.boost.org/doc/html/threads/concepts.html#threads.concepts.Mutex
+//
+// It maps to a CRITICAL_SECTION on Windows or a pthread_mutex on POSIX.
+//
+
+#include <ndnboost/config.hpp>
+
+#if !defined(BOOST_HAS_THREADS)
+# include <ndnboost/smart_ptr/detail/lwm_nop.hpp>
+#elif defined(BOOST_HAS_PTHREADS)
+# include <ndnboost/smart_ptr/detail/lwm_pthreads.hpp>
+#elif defined(BOOST_HAS_WINTHREADS) || defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+# include <ndnboost/smart_ptr/detail/lwm_win32_cs.hpp>
+#else
+// Use #define BOOST_DISABLE_THREADS to avoid the error
+# error Unrecognized threading platform
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED