[boost] [1.38.0] beta release candidate

[1.38.0] beta release candidate packages are available at http://boost.cowic.de/rc/ I'm doing a library build right now on Windows/VC++ 9.0. I'd appreciate it if someone could try a library build on a Linux system, and report any problems. Although we won't hold the beta for minor tweaks, I would like to be sure that docs are present and libraries build before pushing this out to SourceForge. Thanks, --Beman