Add NEI handler for Railcraft machines.

Rolling Machine, Coke Oven etc.

Doesn't one of the NEI addons already do that?

Nope. Railcraft supports CraftGuide instead of NEI. You can use NEIPlugin for NEI integration. The actual reason that Railcraft does not support NEI was the chunk loading ability incompatibility between codechickencore and railcraft.

Chunk loading incompatibility? No, I just really dislike NEI's code. I tried once, it was way too much of a headache to support.