Imported existing code

libraries/include/boost/python/detail/none.hpp

@@ -0,0 +1,20 @@
+//  (C) Copyright David Abrahams 2000.
+// 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)
+//
+//  The author gratefully acknowleges the support of Dragon Systems, Inc., in
+//  producing this work.
+
+#ifndef NONE_DWA_052000_H_
+# define NONE_DWA_052000_H_
+
+# include <boost/python/detail/prefix.hpp>
+
+namespace boost { namespace python { namespace detail {
+
+inline PyObject* none() { Py_INCREF(Py_None); return Py_None; }
+    
+}}} // namespace boost::python::detail
+
+#endif // NONE_DWA_052000_H_