[boost] Seriialzation library draft # 18 uploaded to files section

Fellow boosters, I just uploaded version #18 of the proposed boost serialization library to the files section. It can also be downloaded at www.rrsd.com It contains improvements in code/file/namespace organization, better documentation on how its implemented, and a number of arcane bug fixes. This is the version I will refer to during the upcoming review. Robert Ramey