[GHC] #2659: Add sortOn and other *On functions

[GHC]

#2659: Add sortOn and other *On functions
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    Reporter:  twanvl            |        Owner:              
        Type:  proposal          |       Status:  new         
    Priority:  normal            |    Milestone:  Not GHC     
   Component:  libraries/base    |      Version:  6.9         
    Keywords:                    |   Difficulty:  Unknown     
          Os:  Unknown/Multiple  |     Testcase:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
---------------------------------+------------------------------------------
Changes (by merehap):

 * cc: merehap (added)
  * failure:  => None/Unknown


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2659#comment:5>
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