patch applied (cabal): Made it possible to run executeables with data files in place.

[Duncan Coutts]

Sun Apr 13 06:41:55 PDT 2008  Johan Tibell <johan.tibell at gmail.com>
  * Made it possible to run executeables with data files in place.
  Added an environment variable, DATA_DIR, that is checked before the
  installation data directory is used.

    M ./Distribution/Simple/Build.hs -7 +14
    A ./tests/systemTests/dataDir/
    A ./tests/systemTests/dataDir/Exe.hs
    A ./tests/systemTests/dataDir/data-file
    A ./tests/systemTests/dataDir/dataDir.cabal

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20080413134155-73595-9cf7f0730e74cde17e6e455019514e8fd64a9da6.gz