- 'axis' arg was not coerced from a tuple like other args now do. - 'axis' arg was being modified in-place (VERY BAD). - also made new function matrix_3x3_as_4x4().
- 'axis' arg was not coerced from a tuple like other args now do. - 'axis' arg was being modified in-place (VERY BAD). - also made new function matrix_3x3_as_4x4().