Provides functions to throw and catch exceptions. Unlike the functions from
'Control.Exception', which work in 'IO', these work in any stack of monad
transformers (from the 'transformers' package) with 'IO' as the base monad.
You can extend this functionality to other monads, by creating an instance of
the 'MonadCatchIO' class. Warning: this library is deprecated. Use the
'exceptions' library instead, if possible.
