Toy implementation of AFRP with Yampa-like API.
The idea is to have a simple (though inefficient) implementation that follows the original FRP denotation.
It is primarily useful for learning FRP, and (perhaps) for building small applications.
It's not designed for practical usage, since there is no optimizations and lack of arrow notation makes it very unwieldy to work with arrows.
Much of the credit goes to @cobpg as purescript-miniyampa is based on his gist.