divide packages into "core" and "extra" packages
The following packages are now "core" packages: base, Cabal, haskell98, readline, regex-base, regex-compat regex-posix, stm, template-haskell, unix, Win32 Core packages are those packages required to bootstrap GHC, or are closely tied to GHC (stm, template-haskell). These are the packages that will be provided in a source distribution from now on. All other packages are classified as "extra" packages. As far as binary distributions and nightly builds go, nothing will change - we'll still build and include all these packages in the distributions. NOTE: 'sh darcs-all get' will now get the core packages only. To get the extra packages too, use 'sh darcs-all --extra get'.