[boost] [serialization] vc6 and Header Ordering

Hi Robert, The header ordering issue is solved... except on vc6. Unfortunately the technique depends on instantiating static members of templates with more than two dependent types, which leads ultimately to the same problem described here: http://www.boost.org/libs/serialization/doc/implementation.html#vc6. I've made lots of clever attempts at workarounds, but this compiler bug is etremely stubborn. If you're interested in a fix for the issue that doesn't work on vc6, or if you're ready to drop support for vc6, then I'll proceed. Otherwise, please let me know and I'll check my work in on a branch for posterity. Thanks, -- Dave Abrahams Boost Consulting www.boost-consulting.com