patch applied (cabal-install): Implement cabal install --constraint=

[Duncan Coutts]

Tue Dec 16 15:50:32 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Implement cabal install --constraint=
  Connect up the existing user interface with the new dep resolver api.

    M ./Distribution/Client/Install.hs -10 +18

View patch online:
http://darcs.haskell.org/cabal-install/_darcs/patches/20081216235032-adfee-532912a143728077a7972e7326c8eb17c7eab78e.gz