Reshuffle the files for better nix organization

default.nix

@@ -1,3 +1,8 @@
-{ haskellPackages, haskell }:
+{ pkgs ? import <nixpkgs> {} }:
 
-haskell.lib.disableSharedExecutables (haskellPackages.callCabal2nix "site" ./. {})
+with pkgs;
+
+rec {
+  site = haskellPackages.callPackage ./site {};
+  rauhala-info = callPackage ./rauhala.info { site = site; };
+}