[boost] 1.63 status

I would like to merge a bunch of serialization library fixes to the master which is going to be 1.63. I hadn't done as I wasn't ready and it seemed that the release of 1.63 was imminent. But I haven't heard anything. So I'm wondering if things have gotten hung up and maybe I could merge. Assuming I can't do this, does anyone have any idea when the master would be open for merges? Robert Ramey