Add expensive recipes

[Saintis]

Add the option to use the expensive recipes for items.

[Lava84flow]

yeah this would be pretty handy, it's a a pain to figure output to intake needs...

[JuicyJuuce]

@Saintis @Lava84flow

Before @doomeer became active again, dwahler had a fork of this repository. I forked that and made the following patch a while ago. If someone wants to make a pull request for it then go ahead, but it is based on a version from last May:

https://github.com/JuicyJuuce/factorio/blob/patch-1/recipes_expensive.ml