mods to boost serialization

* fix Visual Studio 2013 (aka MSVC12) build
* boost trac ticket [8757](https://svn.boost.org/trac/boost/ticket/8757)
* copied from [merge trunk to release commit](https://github.com/smanders/boost-trunk/commit/a347d7fe910cbac27a744364171996f5c0fa3d24#diff-68) made after 1.55.0 tag