create a github milestone and tag all closed issues (which have no milestone) with the current milestone

[jstrachan]

it'd be awesome to create milestones every time we do a release where there are closed issues which are not associated with a milestone

Then we can easily see what releases got fixed in what version - all done mostly automatically. (folks can always update the milestone on the issue after the release).

So how about a function, githubCreateMilestone(String version) which would:

• find all closed issues with no milestone
• if there are any issues not marked with a milestone then really create a github milestone & associate those issues
• we may want to avoid creating a milestone for releases with no fixed issues maybe? I guess that could be flag?