[haddock] #93: Move lexing and parsing of Haddock comments into Haddock

[haddock]

#93: Move lexing and parsing of Haddock comments into Haddock
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Reporter:  waern        |        Owner:       
    Type:  refactoring  |       Status:  new  
Priority:  major        |    Milestone:  2.6.0
 Version:  2.4.1        |   Resolution:       
Keywords:               |  
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Changes (by waern):

  * type:  task => refactoring

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Ticket URL: <http://trac.haskell.org/haddock/ticket/93#comment:1>
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