darcs patch: Improve 'cabal list' (and 1 more)

[Lennart Kolmodin]

Sat Mar  1 21:21:17 CET 2008  Lennart Kolmodin <kolmodin at gentoo.org>
  * Improve 'cabal list'
  Make the output of 'cabal list' prettier. 
  $ cabal list xmonad
   * xmonad
        Latest version available: 0.6
        Latest installed version: 0.6
        Homepage: http://xmonad.org
        Category: System
        Synopsis: A tiling window manager
        License:  BSD3
   * xmonad-contrib ...[snip]
  Very much like the gentoo tools eix and esearch.
  This targets part of ticket #235. It still does not show packages that are
  installed but not available.

Sat Mar  1 23:27:04 CET 2008  Lennart Kolmodin <kolmodin at gentoo.org>
  * Implement --installed to 'cabal list'
  Adding --installed to 'cabal list' will make it print only packages that are
  installed.
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