[boost] xpressive fixes, ok to merge to release?

I found some fixes that I made to trunk a while back and neglected to merge to release. They've been on trunk for a while and have caused no problems there. OK to merge? Changeset: http://svn.boost.org/trac/boost/changeset/43506 Fixes: http://svn.boost.org/trac/boost/ticket/1564 Changeset: http://svn.boost.org/trac/boost/changeset/43177 Fixes: http://svn.boost.org/trac/boost/ticket/1625 Also, I've corrected some minor docs inaccuracies and would like to merge those changes as well: Changeset: http://svn.boost.org/trac/boost/changeset/43718 -- Eric Niebler Boost Consulting www.boost-consulting.com