Feature request: Add LambertAnimationMaterial

[supermoos]

First of all, thanks for this amazing library!
It's my understanding that LambertMaterial is slightly more performant than PhongMaterial. Would be nice to add it as default material to the library :-)

[zadvorsky]

Thanks for the suggestion.

I added BAS.LambertAnimationMaterial in the new release (2.2.0).

Do note however that Lambert does not support flat shading, so you will have to compute vertex normals every time.

[supermoos]

Wow, thanks! That was fast :-)