-Implement animated stage model imports for Billy Hatcher
Basically, stages in Billy Hatcher, in addition to the large stage model, have access to smaller visual only models that animate. These are different from usual stage objects and so will always be in that .lnd file.
For the sake of user control, it's a bit obtuse looking. AnimModels are named 'animModel-{animModel id}-{anim model animation id}+{variant}.
The variant part can be animation, baseModel, night, or transform. animation contains the animation as you'd expect, though if you'd want to change this, you should change animation id to a new id as well. Otherwise, one of the ones of the same id will override it.
baseModel is the actual model that gets used.
night should be exactly the same as the base model, but with its own set of vertex colors. This can also just be a copy of the baseModel file if the user doesn't care.
transform is the transformation parameters of the object in the world space of the stage. So if you wanted to change the position, rotation, or scale of the object, you'd do it with this file.
None of this has been tested with models that have more than a single bone and I have no idea if the game would even accept that so expect it not to work at this point in time.