patch applied (packages/base): Move Integer out into its own package

[Don Stewart]

igloo:
> Sun Mar 23 11:13:42 PDT 2008  Ian Lynagh <igloo at earth.li>
>   * Move Integer out into its own package
>   We now depend on the new integer package.
>   We also depend on a new ghc-prim package, which has GHC.Prim,
>   GHC.PrimopWrappers, and new modules GHC.Bool and GHC.Generics,
>   containing Bool and Unit/Inl/Inr respectively.

Wow. Great idea.