Add support for std::shared_ptr.

test/boost_shared_ptr.cpp

@@ -0,0 +1,20 @@
+// Copyright David Abrahams 2002.
+// Copyright Stefan Seefeld 2016.
+// 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)
+
+#include <boost/python/module.hpp>
+#include <boost/python/class.hpp>
+#include <boost/python/call_method.hpp>
+#include <boost/python/extract.hpp>
+#include <boost/python/def.hpp>
+#include <boost/shared_ptr.hpp>
+#include <memory>
+
+using boost::shared_ptr;
+#define MODULE boost_shared_ptr_ext
+
+#include "shared_ptr.hpp"
+#include "module_tail.cpp"
+