Transf WD Euler transformation

[Laurent MICHEL]

Dear,

My comment #1: Why is the Euler Transformation class so complex?

- It is always a 3D transformation, this there is no reason to setup a 
1-* aggregation with angles.

- Euler angles (nutation, rotation, intrinsic rotation) are well 
defined, there is no need for a specific datatype (EulerAngle). So we 
could just have 3 class attributes.

- Using a specific datatype where angles are identified by a the name of 
the rotation axis supposes we have a vocabulary for this, which is a bit 
complicated for this purpose with the risk a implementation errors.

Take care of yourself.

LM

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