clearNodeTransform with animations

[kzhsw]

Currently the function clearNodeTransform could apply local transform to mesh primitives.
It seems morph targets are already supported, but could there be an option or function to apply this on translation, rotation, scale animations?

[donmccurdy]

@kzhsw I think that'd be a useful addition, yes – just opened a feature request ticket for it in #1013. Not something that I'm planning to work on right now, but would be welcome if you would like to give it a shot!