@hackage backprop0.0.1.0

Heterogeneous, type-safe automatic backpropagation in Haskell

See README.md.

At the moment this project is in _pre-alpha_ (v0.0.1.0), and is published/put up on Hackage as a call for comments and thoughts. It has 100% documentation coverage at the moment. Performance was not yet a priority before this, but will be from now on. (Previously, highest priority was API/usability). See the TODO section in the README for more information on what's missing, and how one would be able