/////////////////////////////////////////////////////////////////////////////
//
-// (C) Copyright Ion Gaztanaga 2006-2012
+// (C) Copyright Ion Gaztanaga 2006-2013
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
-> Return pointers by const reference if node traits return them by const reference to optimize shared memory pointers
-> Detect call signatures by has_member_function_callable_with instead of exact match to allow taking by const reference
-> Optimize operations taking const_node_pointer using template parameters and SFINAE to allow node_ptr
+-> Add explicit constructors when needed
+-> Add all containers to external_value_traits
+-> Add test to check sizes (EBO)