Add recipe: helm-hayoo

I'm the maintainer, wrote a custom helm source to search
[hayoo][hayoo] (haskell api) from helm.  This is my first offical
package.

I am not totally sure about the version bounds, they might be too
restrictive and I don't know why the commentary section is not shown
in the package description, any ideas?

Link to repo: https://github.com/markus1189/helm-hayoo

Best,
Markus

[hayoo]: http://holumbus.fh-wedel.de/hayoo/hayoo.html "hayoo"