[GHC] #9586: Implement Traversable/Foldable-Burning-Bridges Proposal

[GHC]

#9586: Implement Traversable/Foldable-Burning-Bridges Proposal
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       Reporter:  hvr                |                   Owner:  hvr
           Type:  task               |                  Status:  new
       Priority:  normal             |               Milestone:  7.10.1
      Component:  libraries/base     |                 Version:
       Keywords:                     |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Difficult (2-5     |         Type of failure:
  days)                              |  None/Unknown
     Blocked By:                     |               Test Case:
Related Tickets:                     |                Blocking:
                                     |  Differential Revisions:
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 More details to follow. I've created this ticket to be able to refer to
 from related preparatory commits.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9586>
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