Monads for free

 Free monads are useful for many tree-like structures and domain specific
 languages.
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 A Monad n is a free Monad for f if every Monad homomorphism from n to another
 monad m is equivalent to a natural transformation from f to m.
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 Cofree comonads provide convenient ways to talk about branching streams and
 rose-trees, and can be used to annotate syntax trees.
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 A Comonad v is a cofree Comonad for f if every Comonad homomorphism another
 comonad w to v is equivalent to a natural transformation from w to f.
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 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.