simonMar: the recent -odir fix in GHC means the workaround in Cabal has to be (selectively) disabled.

  export tweak to Setup.hs
  avoid warning in PreProcess.hs
  rearrange handling of --prefix.

  documentation updates from ross paterson
  - more accurate specification of package names
  - hs-source-dir -> hs-source-dirs in examples
  - setup clean removes a bit more
  - rearrange description of fields

  Version.hs: allow more spaces in version constraints

  Install.hs: add the exe extension when installing executables (reported by Brian Smith)
 
  test directory: add explicit dependencies on base

  Misc:
  Prefix error messages and warnings with the program name, and send them
  to stderr.  (Also moved some stuff from Distribution.Simple.Utils to
  Distribution.Simple.Build to avoid circular dependencies.)

  refactoring only: split Compiler type from Distribution.Setup,
  to reduce dependencies.

  Exclude DefaultSetup.lhs from the GHC build

  add JHC to the Compiler type

  refactored argument processing

  setup sdist --snapshot: append YYYYMMDD to the version for the bundle

  improved error messages (from Brian Smith):
  
  * attach source locations to messages when available
  
  * change some remaining error's do die.

  refactor defaultMainWorker

  split Distribution.Extension between Language.Haskell.Extension (just
  the type, which will also be useful when haskell-src-exts is merged)
  and Distribution.Compiler (mappings to compiler options).

  add Language.Haskell.Extension

  Simon marlow:  update defaults for prefix/libdir/bindir

Since we don't have hs-source-dir anymore, the location for building
executables had changed.  However, install was still looking in the
old location.  Fixed this.

Fixed another bug where hs-source-dir for executables was [".","."]
where this duplication caused a problem in locating the Main module.
Not sure quite where this came from, but now for combining fields, we
always nub, so this should be a robust fix.

Fixed build failures in testing code.

Krasimir:
  added hs-source-dirs (ross added docs)

  Add other-files field to PackageDescription. This is a list files
  which belong to the package but aren't compiled. These files are
  copied and packaged from sdist command.

Ross:
  fixes to buildHugs and sdist after hs-source-dirs changes.
  
  Also simplified smartCopySources a bit.

  document sdist and new other-files field.