[Hackage] #361: Add documentation location information to cabal list package command

[Hackage]

#361: Add documentation location information to cabal list package command
----------------------------+-----------------------------------------------
  Reporter:  guest          |        Owner:  duncan             
      Type:  enhancement    |       Status:  assigned           
  Priority:  normal         |    Milestone:  cabal-install-0.6  
 Component:  Cabal library  |      Version:  1.2.3.0            
  Severity:  normal         |   Resolution:                     
  Keywords:                 |   Difficulty:  very easy (<1 hour)
Ghcversion:  6.8.2          |     Platform:                     
----------------------------+-----------------------------------------------
Changes (by duncan):

  * status:  new => assigned
  * difficulty:  normal => very easy (<1 hour)
  * owner:  => duncan

Comment:

 Mostly done, as part of `cabal info` (see #456)

 {{{
 $ cabal info cabal
 * Cabal
     Latest version available: 1.6.0.1
     Latest version installed: 1.6.0.2
     Homepage:      http://www.haskell.org/cabal/
     ...
     ...
     Documentation: /home/duncan/.cabal/share/doc/Cabal-1.6.0.2/html
     Modules:
         Distribution.Compat.ReadP
         ...
 }}}

 There's one TODO left which is to check the dir really exists and that
 ghc-pkg is not lying to us (which if it is is really our fault in the
 first place).

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/361#comment:2>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects