[boost] [system] Status update

The C++ committee accepted what is essentially Boost.System for C++0x. See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2241.html for the final proposal. That proposal is now reflected in the working paper for the new standard. See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2284.pdf The committee made some minor last minute changes. Those changes are not yet reflected in Boost.System. The plan is to bring Boost.System into compliance with the standard sometime in the next month or so. There are still a few outstanding issues; missing clear() specs, constexpr needed on a constructor, error_category should be non-copyable, and perhaps one or two others. --Beman