[Rd] Curry: proposed new functional programming, er, function.

[Peter Danenberg]

Sharpie wrote:
> Currently, the only Curry implementation I know of is in the roxygen
> package which is kind of a weird dependency to install just for this
> one function.

I end up using Curry so much outside of Roxygen that I spun it off
into the `functional' package:

  https://r-forge.r-project.org/projects/functional/

Compose is there, too, and a couple other superfluous things.