Quaternion data layout incompatible with GLSL/GLTF

[mgustavsson]

When sending a quaternion to a GLSL shader as a vec4, the Mathter fields (w,x,y,z) will map to (x,y,z,w) in GLSL which is unfortunate.

This is also a potential issue of bugs when importing quaternions from file formats that store quaternions in (x,y,z,w) order such as GLTF.

Would you consider changing the layout to put w last in the class layout?