Fix Bugs

1. Fix AABB computation bugs when multiple meshes exist.
2. Fix Animation3D create bugs.
If your boy.c3b contains multiple animations with name walk, idle, and so on. You can create walk animation using the following code, 

// create the first animation if animation name is not provided, we do not use the last parameter in the past.
auto animation = Animation3D::create("boy.c3b", "walk");
auto animate = Animate3D::create(animation);

As far as I known 3d max can not export animation with multiple names. But some developers found that the Blender can.