patch applied (hugs98): Added a shiny new unified darcs-all script

[Sven Panne]

Sun Apr  1 10:49:41 PDT 2007  sven.panne at aedion.de
  * Added a shiny new unified darcs-all script
  
  This is a mildly tested new version of a darcs-all script which should work
  with GHC, Hugs, and nhc98. It is not yet a full 100% replacement of the
  existing scripts, but it will soon be. Apart from the fact that it is not tied
  to a single Haskell implementation, its main new features are that it uses a
  single more powerful package description file and offers a --release option to
  retrieve a given set of package versions from Hackage.
  
  To do:
  
   * Handle more general URLs in the package list
  
   * Add a mode to print out the list of packages (for Makefiles, scripts, etc.)
  
   * --complete/--partial: What should be the default?

    A ./darcs-all
    A ./package-list