* To add a new custom stonecutter recipe, use `mcl_stonecutter.register_recipe(input, output, count)`
*`input` must be a name of a registered item
*`output` must also be a name of a registered item
*`count` should be a number denoting output count, this defaults to 1 for `nil` and invalid values
* a number with a fraction passed as count will be rounded down
* Stairs, slabs and walls get their recipes registered automatically
* Recipe chains are followed automatically, so any recipes taking `output` of another recipe as input will also be taking `input` of that recipe as their input
