patch applied (packages/base): add Data.Foldable.{for_, forM_} and Data.Traversable.{for, forM}

[Ross Paterson]

Wed Aug 30 06:38:05 PDT 2006  Ross Paterson <ross at soi.city.ac.uk>
  * add Data.Foldable.{for_,forM_} and Data.Traversable.{for,forM}
  
  generalizing Control.Monad.{forM_,forM}

    M ./Data/Foldable.hs +12
    M ./Data/Traversable.hs +12