Updated working-draft JPMS specification

[mark.reinhold at oracle.com]

I've updated the working-draft specification to add a "future work"
section, as promised in our final meeting last week [1]:

  http://cr.openjdk.java.net/~mr/jigsaw/spec/#Future-work

At this point the working draft reflects, so far as I know, all of our
recent decisions.  If I've missed anything, or if you have any further
comments or suggestions, please let me know by noon UTC next Tuesday,
6 June, so that I can prepare to submit the specification to the JCP
PMO for the Public Review Reconsideration Ballot.

If you say nothing between now and that time then I'll assume that you
have no objections to submitting the specification in its current form.

- Mark


[1] http://openjdk.java.net/projects/jigsaw/spec/minutes/2017-05-23#Ready-to-move-forward