Improve the probability system for centrifuge outputs

[TinkerWorX]

Current, we are limited to an integer in the [1; 100] range. It would be great with a float in the [0.00;1:00] range to give us more freedom to create very low chance outputs. So basically add support for HashMap<ItemStack, float>.

Another improvement would be a way to add multiple things in the same probability range, but limited to only one output. Something like HashMap<ItemStack[], float> where it will pick a random ItemStack from the ItemStack[]. For example, I could add ItemStack[dirt, sand, gravel], 0.10f, which would give a 10% chance to get either one dirt or one sand or one gravel, but never two at a time.

[mezz]

Thanks for the suggestion!
I added float support to the CentrifugeManager, and also created a way to make custom recipes that implement whatever logic you want for their output (with getProducts).

https://github.com/ForestryMC/ForestryAPI/blob/master/forestry/api/recipes/ICentrifugeManager.java

https://github.com/ForestryMC/ForestryAPI/blob/master/forestry/api/recipes/ICentrifugeRecipe.java