Nifty

Added

• RecipeIngredient and implementations for more modular item, fluid ingredients etc.
• RecipeOutput, RecipeOutputSet, and item/fluid implementations
• ModularRecipe for recipes that can input/output fluids and items, and can require processing times/energy consumption
• FluidStack#getTooltip, along with a per-instance tooltip cache that is only created when it's queried for the first time.
• FluidStack#setTag, because I guess I forgot it before oops
• Drawable and its subclasses for configurable renderable things that aren't Gizmos - eventually Gizmos will be restructured to use this interface
• Drawables with a bunch of convenient drawable instances, such as slots, recipe arrows (with filling variants), burn indicators etc.

Changed

• Moved some rendering things around, like Texture - now found among drawables.
• Some refactoring with gizmos to account for the above additions and changes.