Added a RecipesHandler for the barrel. It now supports FluidItemCrafting and FluidMixing, althought FluidItemCrafting is the only mode implemented at this moment. The fluid-item crafting has a variable duration and while the barrel is crafting no extraction is possible, also the item inside will spin at 4 times the normal speed. In preperation to the FluidMixing crafts the FluidCrafting was implemented which is a fluid that is just for crafting with two base fluids who when mixed do not really create any outcome.