darcs patch: Add preliminary support for haddock-ghc (and 9 more)

[Simon Marlow]

davve at dtek.chalmers.se wrote:
> Fri Sep 15 21:29:49 CEST 2006  davve at dtek.chalmers.se
>   * Add preliminary support for haddock-ghc
> 
> Fri Dec 29 20:54:39 CET 2006  davve at dtek.chalmers.se
>   * Make sure haddock-ghc really creates the output dir
> 
> Sun Dec 31 00:21:16 CET 2006  davve at dtek.chalmers.se
>   * Add compilerPath to Paths_<pkg>
> 
> Fri Jan  5 22:22:24 CET 2007  davve at dtek.chalmers.se
>   * Add -D__HADDOCK__ to haddock-ghc
> 
> Sat Jan  6 02:44:20 CET 2007  davve at dtek.chalmers.se
>   * Generate GHC arguments usable for haddock-ghc
> 
> Sat Jan  6 02:48:01 CET 2007  davve at dtek.chalmers.se
>   * Use -g option to send GHC arguments to haddock-ghc
> 
> Thu Jan 18 22:55:20 CET 2007  davve at dtek.chalmers.se
>   * Don't send -cpp to haddock-ghc
> 
> Mon Feb  5 00:49:25 CET 2007  davve at dtek.chalmers.se
>   * Synch Haddock-GHC changes with recent changes to Cabal
> 
> Mon Mar  5 17:53:42 CET 2007  davve at dtek.chalmers.se
>   * Solve conflict
> 
> Mon Mar  5 20:00:45 CET 2007  davve at dtek.chalmers.se
>   * Use only one haddock command
>   This patch merges the haddock-ghc and haddock commands, treating the "haddock" 
>   executable as haddock-ghc if the version is >= 2.0.

I think this patch should go in ... any other comments before I push it?

CHeers,
	Simon