ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/filesystem/config.hpp b/include/ndnboost/filesystem/config.hpp
new file mode 100644
index 0000000..f70bec2
--- /dev/null
+++ b/include/ndnboost/filesystem/config.hpp
@@ -0,0 +1,109 @@
+// ndnboost/filesystem/v3/config.hpp ----------------------------------------------------//
+
+// Copyright Beman Dawes 2003
+
+// Distributed under the Boost Software License, Version 1.0.
+// See http://www.boost.org/LICENSE_1_0.txt
+
+// Library home page: http://www.boost.org/libs/filesystem
+
+//--------------------------------------------------------------------------------------//
+
+#ifndef NDNBOOST_FILESYSTEM3_CONFIG_HPP
+#define NDNBOOST_FILESYSTEM3_CONFIG_HPP
+
+# if defined(NDNBOOST_FILESYSTEM_VERSION) && NDNBOOST_FILESYSTEM_VERSION != 3
+# error Compiling Filesystem version 3 file with NDNBOOST_FILESYSTEM_VERSION defined != 3
+# endif
+
+# if !defined(NDNBOOST_FILESYSTEM_VERSION)
+# define NDNBOOST_FILESYSTEM_VERSION 3
+# endif
+
+#define NDNBOOST_FILESYSTEM_I18N // aid users wishing to compile several versions
+
+// This header implements separate compilation features as described in
+// http://www.boost.org/more/separate_compilation.html
+
+#include <ndnboost/config.hpp>
+#include <ndnboost/system/api_config.hpp> // for NDNBOOST_POSIX_API or NDNBOOST_WINDOWS_API
+#include <ndnboost/detail/workaround.hpp>
+
+// NDNBOOST_FILESYSTEM_DEPRECATED needed for source compiles -----------------------------//
+
+# ifdef NDNBOOST_FILESYSTEM_SOURCE
+# define NDNBOOST_FILESYSTEM_DEPRECATED
+# endif
+
+// throw an exception ----------------------------------------------------------------//
+//
+// Exceptions were originally thrown via ndnboost::throw_exception().
+// As throw_exception() became more complex, it caused user error reporting
+// to be harder to interpret, since the exception reported became much more complex.
+// The immediate fix was to throw directly, wrapped in a macro to make any later change
+// easier.
+
+#define NDNBOOST_FILESYSTEM_THROW(EX) throw EX
+
+# if defined( NDNBOOST_NO_STD_WSTRING )
+# error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
+# endif
+
+// This header implements separate compilation features as described in
+// http://www.boost.org/more/separate_compilation.html
+
+// normalize macros ------------------------------------------------------------------//
+
+#if !defined(NDNBOOST_FILESYSTEM_DYN_LINK) && !defined(NDNBOOST_FILESYSTEM_STATIC_LINK) \
+ && !defined(NDNBOOST_ALL_DYN_LINK) && !defined(NDNBOOST_ALL_STATIC_LINK)
+# define NDNBOOST_FILESYSTEM_STATIC_LINK
+#endif
+
+#if defined(NDNBOOST_ALL_DYN_LINK) && !defined(NDNBOOST_FILESYSTEM_DYN_LINK)
+# define NDNBOOST_FILESYSTEM_DYN_LINK
+#elif defined(NDNBOOST_ALL_STATIC_LINK) && !defined(NDNBOOST_FILESYSTEM_STATIC_LINK)
+# define NDNBOOST_FILESYSTEM_STATIC_LINK
+#endif
+
+#if defined(NDNBOOST_FILESYSTEM_DYN_LINK) && defined(NDNBOOST_FILESYSTEM_STATIC_LINK)
+# error Must not define both NDNBOOST_FILESYSTEM_DYN_LINK and NDNBOOST_FILESYSTEM_STATIC_LINK
+#endif
+
+#if defined(NDNBOOST_ALL_NO_LIB) && !defined(NDNBOOST_FILESYSTEM_NO_LIB)
+# define NDNBOOST_FILESYSTEM_NO_LIB
+#endif
+
+// enable dynamic linking ------------------------------------------------------------//
+
+#if defined(NDNBOOST_ALL_DYN_LINK) || defined(NDNBOOST_FILESYSTEM_DYN_LINK)
+# if defined(NDNBOOST_FILESYSTEM_SOURCE)
+# define NDNBOOST_FILESYSTEM_DECL NDNBOOST_SYMBOL_EXPORT
+# else
+# define NDNBOOST_FILESYSTEM_DECL NDNBOOST_SYMBOL_IMPORT
+# endif
+#else
+# define NDNBOOST_FILESYSTEM_DECL
+#endif
+
+// enable automatic library variant selection ----------------------------------------//
+
+#if !defined(NDNBOOST_FILESYSTEM_SOURCE) && !defined(NDNBOOST_ALL_NO_LIB) \
+ && !defined(NDNBOOST_FILESYSTEM_NO_LIB)
+//
+// Set the name of our library, this will get undef'ed by auto_link.hpp
+// once it's done with it:
+//
+#define NDNBOOST_LIB_NAME ndnboost_filesystem
+//
+// If we're importing code from a dll, then tell auto_link.hpp about it:
+//
+#if defined(NDNBOOST_ALL_DYN_LINK) || defined(NDNBOOST_FILESYSTEM_DYN_LINK)
+# define NDNBOOST_DYN_LINK
+#endif
+//
+// And include the header that does the work:
+//
+#include <ndnboost/config/auto_link.hpp>
+#endif // auto-linking disabled
+
+#endif // NDNBOOST_FILESYSTEM3_CONFIG_HPP