MonadPlus instance for WrappedMonad?

[Henning Thielemann]

Am 10.12.2014 um 04:00 schrieb David Feuer:
> Yes. WrappedMonad is obsolete in 4.8.0, now that Monad is a subclass of
> Applicative. I think it is likely to be deprecated soon. The MonadPlus
> class itself is now essentially a shorthand for Monad+Alternative. I
> don't think it likely that any further work will be put into those two.

But adding the MonadPlus instance for WrappedMonad seems to be little 
work and might simplify the transition to the new glorious AMP world.