[GHC] #604: Windows installer: use WiX

[GHC]

#604: Windows installer: use WiX
--------------------------+-------------------------------------------------
 Reporter:  simonmar      |          Owner:                    
     Type:  task          |         Status:  new               
 Priority:  normal        |      Milestone:  6.6.1             
Component:  Build System  |        Version:  None              
 Severity:  normal        |     Resolution:  None              
 Keywords:                |     Difficulty:  Difficult (1 week)
 Testcase:  N/A           |   Architecture:  Unknown           
       Os:  Unknown       |  
--------------------------+-------------------------------------------------
Changes (by igloo):

  * milestone:  => 6.6.1
  * testcase:  => N/A

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/604>
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