This library is depricated in favor of my subhask library.
Implements common Haskell type classes using the ConstraintKinds extension to allow constraints. Currently, there are classes for Foldable, Functor, and Traversable and corresponding instances for [], Vector, and Vector.Unboxed. That's because those are what I've been using and I haven't gotten around to adding anything else.
Feel free to contribute your own.