Integrated the not yet accepted boost::nowide library, thanks @alexrj.

xs/src/boost/nowide/integration/filesystem.hpp

@@ -0,0 +1,28 @@
+//
+//  Copyright (c) 2012 Artyom Beilis (Tonkikh)
+//
+//  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)
+//
+#ifndef BOOST_NOWIDE_INTEGRATION_FILESYSTEM_HPP_INCLUDED
+#define BOOST_NOWIDE_INTEGRATION_FILESYSTEM_HPP_INCLUDED
+
+#include <boost/filesystem/path.hpp>
+#include <boost/nowide/utf8_codecvt.hpp>
+namespace boost {
+    namespace nowide {
+        ///
+        /// Instal utf8_codecvt facet into  boost::filesystem::path such all char strings are interpreted as utf-8 strings
+        ///
+        inline void nowide_filesystem()
+        {
+            std::locale tmp = std::locale(std::locale(),new boost::nowide::utf8_codecvt<wchar_t>());
+            boost::filesystem::path::imbue(tmp);
+        }
+    } // nowide
+} // boost
+
+#endif
+///
+// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4