patch applied (cabal-install): Implement --installed to 'cabal list'

Sat Mar 1 14:27:04 PST 2008 Lennart Kolmodin * Implement --installed to 'cabal list' Adding --installed to 'cabal list' will make it print only packages that are installed. M ./Hackage/List.hs -10 +25 M ./Hackage/Setup.hs -11 +42 M ./Main.hs -4 +10 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20080301222704-fdf66-2...