add hoodle (pen notetaking program written in haskell) to nixpkgs

I made  a nix-expression of hoodle: pen notetaking program which is written in haskell.
The home page of hoodle is http://ianwookim.org/hoodle
It depends on several component libraries such as coroutine-object, hoodle-types, xournal-types, xournal-parser, hoodle-builder, hoodle-parser, hoodle-render and hoodle-core. I added all the necessary dependencies.  Current version is 0.2.2.1.