Second Draft: Coroutines

[Richard (Rikki) Andrew Cattermole]

Perma: 
https://gist.github.com/rikkimax/fe2578e1dfbf66346201fd191db4bdd4/7bba547fb6ea09deb2f0cfda2d852c409ace0142

I won't do another round. The functionality hasn't changed, but there 
have been clarifications to how I describe some things as people have 
requested. Along with a new abstract.

I intend to put it into the queue before next monthly meeting. So 
roughly a week away.