CHANGELOG:
2.2.1
-------
* Provide MINIMAL pragmas for `MonadState`, `MonadWriter`, `MonadReader`
* Added a cyclic definition of `ask` in terms of `reader` for consistency with `get`/`put` vs. `state` and `tell` vs. `writer`
* Fix deprecation warnings caused by `transformers` 0.4 deprecating `ErrorT`.
* Added `Control.Monad.Except` in the style of the other `mtl` re-export modules
packaged for wip by pho.
Monad classes using functional dependencies, with instances for
various monad transformers, inspired by the paper Functional
Programming with Overloading and Higher-Order Polymorphism, by Mark P
Jones, in Advanced School of Functional Programming, 1995
(http://web.cecs.pdx.edu/~mpj/pubs/springschool.html).
