Add option to only read input contents on circuit-connected crafters

[Orum]

TL;DR

It would be nice to be able to limit the "Read contents" on the various crafting machines to exclude products and only look at input materials.

What?

Currently when using the "Read contents" on a crafter, it reads the input, output and (optionally) the in-craft materials. For most recipes this isn't a big deal, as the outputs are usually different from the inputs. However, for a few recipes the output is the same as one of the inputs (e.g. both bacteria cultivation recipes, pentapod egg, and fish breeding), and thus there is no way to tell from the signal if the item is in the input or output slots. I really only want the ability to exclude the output in this signal, but maybe someone else wants the ability to exclude inputs as well (maybe from a recipe in a mod)?