[boost] [filesystem] i18n merge complete

The Boost.Filesystem i18n branch has been merged into the main trunk HEAD in CVS. This is a major upgrade, several years in the making. It supports wide character filenames, and has a pile of other improvements. It implements the TR2 library proposal before the C++ Standards Committee. Most, but not all, current code using the library should continue to work OK. Because of all the code changes, there may be teething troubles. I'll try to watch the mailing lists and regression tests closely for the next couple of weeks, and respond to problems ASAP. --Beman