[boost] [graph] Sync develop with master?

Subject: [boost] [graph] Sync develop with master?
From: Murray Cumming (murrayc_at_[hidden])
Date: 2016-05-30 05:37:31

Now that Boost 1.61 is out, it would be great if the various fixes in
boost graph's develop branch could be merged/cherry-picked/whatever to
master, please. There seem to be a couple of years of fixes that have
not appeared in a release.

-- 
Murray Cumming
murrayc_at_[hidden]
www.murrayc.com