Beging work to port f.el to Haskell

This is a work-in-progress. I'd like to add a README to this project to explain
my intention. The goal, roughly, is to port Elisp's fantastic f.el module to
Haskell. I consider Haskell APIs to be useful but somewhat sloppily designed. In
the same spirit as Elixir wrapping Erlang APIs, many of the functions I intend
to define will simply wrap existing Haskell APIs, but with a hopefully cleaner
API that I find more intuitive.

haskell-file/shell.nix

@@ -0,0 +1,9 @@
+with import <nixpkgs> {};
+
+stdenv.mkDerivation {
+  name = "f-hs";
+  buildInputs = [
+    (pkgs.haskellPackages.ghcWithPackages (pkgs: [
+    ]))
+  ];
+}