ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/traits_fwd.hpp b/include/ndnboost/iostreams/traits_fwd.hpp
new file mode 100644
index 0000000..fd2acea
--- /dev/null
+++ b/include/ndnboost/iostreams/traits_fwd.hpp
@@ -0,0 +1,111 @@
+// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
+// (C) Copyright 2003-2007 Jonathan Turkanis
+// 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.)
+
+// See http://www.boost.org/libs/iostreams for documentation.
+
+// Forward declarations of templates defined in traits.hpp.
+
+#ifndef NDNBOOST_IOSTREAMS_IO_TRAITS_FWD_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_IO_TRAITS_FWD_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <iosfwd> // stream types, char_traits.
+
+namespace ndnboost { namespace iostreams {
+
+template<typename T>
+struct is_istream;
+
+template<typename T>
+struct is_ostream;
+
+template<typename T>
+struct is_iostream;
+
+template<typename T>
+struct is_streambuf;
+
+template<typename T>
+struct is_istringstream;
+
+template<typename T>
+struct is_ostringstream;
+
+template<typename T>
+struct is_stringstream;
+
+template<typename T>
+struct is_stringbuf;
+
+template<typename T>
+struct is_ifstream;
+
+template<typename T>
+struct is_ofstream;
+
+template<typename T>
+struct is_fstream;
+
+template<typename T>
+struct is_filebuf;
+
+template<typename T>
+struct is_std_io;
+
+template<typename T>
+struct is_std_file_device;
+
+template<typename T>
+struct is_std_string_device;
+
+template<typename T>
+struct char_type_of;
+
+template<typename T>
+struct category_of;
+
+template<typename T>
+struct int_type_of;
+
+template<typename T>
+struct mode_of;
+
+template<typename T>
+struct is_device;
+
+template<typename T>
+struct is_filter;
+
+template<typename T>
+struct is_direct;
+
+namespace detail {
+
+template<typename T>
+struct is_boost_stream;
+
+template<typename T>
+struct is_boost_stream_buffer;
+
+template<typename T>
+struct is_filtering_stream;
+
+template<typename T>
+struct is_filtering_streambuf;
+
+template<typename T>
+struct is_linked;
+
+template<typename T>
+struct is_boost;
+
+} // End namespace detail.
+
+} } // End namespaces iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_IO_TRAITS_FWD_HPP_INCLUDED