@hackage contstuff1.2.0

This library implements fast and easy to use CPS-based monad transformers. Most of the usual monad transformers are implemented, including ChoiceT, ContT, EitherT, MaybeT and StateT. Because of the design of this library, many other monad transformers are just special cases of those, including e.g. WriterT. The Control.ContStuff.Simple module also provides simplified monad transformer wrappers, which hide the underlying CPS, so you get the full performance, but with a simplified interface. Currently the simplified monad transformers are implemented as type synonyms, so their flexibility is slightly limited.