Please add 3d-transforms

[Shinmera]

This is a library that uses the other 3d-* math libraries to present an encapsulation for a spatial transformation. It offers convenience functions for operating on such transformations and for converting between them and the alternative 4x4 matrix representation.

Author: Nicolas Hafner
Source: https://github.com/shinmera/3d-transforms.git
Documentation: https://shinmera.github.io/3d-transforms