Merging tuples branch into mainline today

[Aldy Hernandez]

> I think that someone, though, should be committed to fixing this pass ASAP 
> after it's checked in; waiting until late August to fix it seems bad.  Is 
> there someone else who can commit to working on it as a high priority after 
> the main tuples checkin?

I would obviously vote in favor of removal if the pass is unmaintained,
but if it is agreed that it will be maintained, I can commit to working
on it as soon as we merge.

If it is maintained, I would count on having the maintainers provide me
some consulting help throughout the conversion :).

Aldy