patch applied (packages/Cabal): Add Text instance for BuildType and add UnknownBuildType constructor

[Ian Lynagh]

Mon Mar 24 07:14:00 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Add Text instance for BuildType and add UnknownBuildType constructor
  Drop parseReadSQ as that was the last use of it.
  Still need to add a build warning for UnknownBuildTypes

    M ./Distribution/PackageDescription.hs -2 +25
    M ./Distribution/PackageDescription/Parse.hs -1 +1
    M ./Distribution/ParseUtils.hs -5 +1

View patch online:
http://darcs.haskell.org/packages/Cabal/_darcs/patches/20080324141400-adfee-06c4466ca79c939a4263c8650f9f828edb931fb7.gz