Revert "cabal-file: remove version restriction"
Revert "cabal-file: remove version restriction"

This reverts commit 1b2af84c5962dc24d0529bfcac74cc8b33dafa74.

SWP-Ubau-SoSe2014-Haskell/SWPSoSe14,SWP-Ubau-SoSe2014-Haskell/SWPSoSe14