patch applied (ghc): Windows installer improvements from Claus

[Ian Lynagh]

Thu Oct 21 05:29:42 PDT 2010  Ian Lynagh <igloo at earth.li>
  * Windows installer improvements from Claus
  - add link to inno setup docs, so readers don't have to guess what
    ghc.iss might be
  
  - add Task section, and associated most Registry actions with separate
    (sub)tasks, so that file associations, default action, and PATH
    setting can be optional
  
  - copy license file into doc directory
  
  - install icon file again, so that DefaultIcon is no longer a dangling
    pointer (#4352)
  
  - only delete ghc_haskell key if empty (in case there were other tools
    using it)
  
  - add versioned GHCi to right-click menu (to allow for multiple tool installs)

    M ./distrib/ghc.iss.in -9 +29

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20101021122942-3fd76-2ee0181fd2b88d6852b1822648161196ad9ce1e7.gz