Added amount display for liquids
* Added tooltips for routing tube
Added proper filters
Changes:
+ Added icon for color filter
* Fluid filters now render as fluid blocks
* FilterFactories can now determine whether to create a filter based on
whether it needs to be a real thing or not
* Can no longer use the vanilla slot dragging to drop into filter slots
* Fixed up filter saves using write directly instead of using the
FilterRegistry.writeFilter() method
* Fixed a routing bug where simulateEffects was being called on the
wrong object