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They no longer exist.

 - the package DB is a directory containing one file per package
   instance (#723)

 - there is a binary cache of the database (#593, #2089)

 - the binary package is now a boot package

 - there is a new package, bin-package-db, containing the Binary
   instance of InstalledPackageInfo for the binary cache.

Also included in this patch

 - Use colour in 'ghc-pkg list' to indicate broken or hidden packages
  
   Broken packages are red, hidden packages are 
  
   Colour support comes from the terminfo package, and is only used when
    - not --simple-output
    - stdout is a TTY
    - the terminal type has colour capability

 - Fix the bug that 'ghc-pkg list --user' shows everything as broken

and fix up related cruft

We were running into problems like:
    for f in  LICENSE configure config.sub config.guess [...]
    make[2]: execvp: /bin/sh: Argument list too long
This patch moves the loop into make, rather than the shell.

This checks that hackage would accept the packages.
Currently warnings are printed, but don't result in failure.

This is a bit kludgy. We've hit the maximum number of arguments you can
have in the for loop for adding files to the bindist list, so this just
splits the list in 2.

The .dyn_hi files currently depend on the .dyn_hi files of modules that
they import. But they actually want the .hi files of modules from
another package.This we make the .dyn_hi files depend on the .hi files
so we are sure that they exist and are up-to-date.

Rather than indirecting through an integer package