Proposal: Add instances for Functor, Monad, Applicative to Data.Monoid.First, Last

Ticket: http://hackage.haskell.org/trac/ghc/ticket/4880 This proposal adds missing instances for the two newtype wrappers for Maybe in Data.Monoid. A patch is attached to the ticket. Both the motivation and implementation are straightforward. Discussion period: 2 weeks (until 20 Jan 2011). Cheers, Sterl