Revamped concurrency API

[bearophile]

Andrei Alexandrescu:

>Unfortunately, Bartosz has declined to contribute.<

I have read a good amount of his interesting blog posts, he has shown me many things I didn't know about. And he was very happy about the idea of helping D concurrency. Do you know why he has changed his mind regarding this? Maybe because Walter has refused the uniqueness/lend ideas?

Bear hugs,
bearophile