[Pitch #6] Actors

I don't, because that proposal is a bit further down the dependency chain. We can riff on this over in that thread. But...

So are isolated parameters. Given that much of the discussion in the last few iterations has been about isolated parameters, I've separated out isolated parameters and nonisolated declarations into a separate proposal on improved control over actor isolation. It's not actually a significant simplification to the proposal, in complexity or word count, because the same concepts have always existed in the model---we just delay naming them.

EDIT: added a link to the separate proposal. The actors proposal has also been updated accordingly.

Doug