Improve MOAITransform internals (include shear; improve 3D)

[patrickmeehan]

To support generalized bind/unbind from parent transforms we need to include shear in the MOAITransform internals. We can consider rewriting these to look more like a basis with some extra info. The new representation should be well suited for 3D, able to quickly be animated across all components and readily return information about each component performing as few conversions and calculations as possible.

[patrickmeehan]

Adam and I discussed this and decided that the current implementation (6 shear values and 3 Euler angles) is optimal given our set of goals.