elfeed-org recipe

I would like to submit my elfeed-org package to Melpa. 
> Elfeed-org makes elfeed feed configuration easy with org-mode. 
> Full documentation here: https://github.com/remyhonig/elfeed-org 
> I am the author and maintainer.

This is my first contribution to Melpa. I may miss something, so please tell me, I will fix it.

Regards