[boost] Serializing bitsets and tuples

Again, Robert, I have to thank you immensely for the Serialization library. It has made my life much easier. Anyway, I was wondering, since you state in the manual that all STL containers are supported, why I can't seem to find std::bitset in that. I realize that it is probably not the most common container to serialize, but still. Also, considering the is Boost library now, I'm wondering about the apparent absence of serialization for boost::tuple. It's not the end of the world (I can write them myself rather easily, I suppose), but for completeness I'd think at least Boost.Tuple should be supported. -- /Brian Riis