Nice! Can't wait to try it. I'm using the 0.5 version but in a very simple case since it was proposed. The  issues indeed were good reasons for rejection and I was a bit afraid that it had killed motivation to resubmit another version.

By the way, Emmanuel Deloget was also working for a standard proposal for a process library, I don't know if he is still working on it: https://code.google.com/p/edt-process-cpp1y/

I don't remember if he mentionned a potential inclusion in Boost.

The "style" of that library is very different compared the boost proposals so far (as you can see in the example).