Tweaking rotate function in transforms module.
Tweaking rotate function in transforms module.

If transform_matrix if not None, check if it is 3x3. if it is,
create new 4x4 transform_matrix filled with elements of
3x3 transform_matrix.

androomerrill/scikit-nano,scikit-nano/scikit-nano,scikit-nano/scikit-nano,androomerrill/scikit-nano