F# Pipeline: Explainer & Spec

[mAAdhaTTah]

I drafted up an initial version of the explainer for the F# Pipeline Operator. It's built on the current implementation's explainer, so there's some overlap, but I tried to address some of the discussions we've had since then, like importable methods, as well as explain how p |> await works.

I also opened a pull request into the repository to officially include #104 as part of the operator. That said, writing parentheses around assignment, even in the explainer, was really annoying, so I'd love to make it work without requiring parentheses there. If that isn't feasible, I'm not sure we should do it. We need to make a decision before I can implement the babel plugin, or we need to implement another flag to test both.

Otherwise, interested in questions, comments, suggestions. I've got a few other things I'm going to add marked in issues, but I'm ready to hear feedback.

[js-choi]

Again, excellent job, @mAAdhaTTah. The parenthesis problem is indeed a big one, but it is still very good to have a concrete formal proposal.

I haven’t had time lately to work on the next step—the Babel plugin—but I’ll still keep in touch about my progress.

[tabatkins]

Closing this issue, as the proposal has advanced to stage 2 with Hack-style syntax.