Integrate pinentry-mac into pinentry

[Neal H. Walfield]

At Mon, 16 Nov 2015 11:00:07 +0100,
Neal H. Walfield wrote:
> At Sat, 14 Nov 2015 10:47:41 +0100,
> Roman Zechmeister wrote:
> Thanks for contributing this.  I pulled your changes and they build on
> GNU/Linux so there is no obvious regression :-).
> 
> Werner: do you want to pull this into our tree?  The main problem that
> I see is that none of us (= g10 people) have access to a Mac machine
> to test this.

I spoke with Werner about this offline and we agreed that it would be
good if the code for the MaxOS X pinentry was integrated into our
repo.  But since we don't have access to Mac, we need you to commit to
testing and maintaining it.  Let me know if this is acceptable.

Thanks!

:) Neal