Currently it is not possible to have a RowMajor Transform, because the RowMajor bit is ignored when passed as Option to Transform. Patch should be just to remove/replace
when defining MatrixType in Transform class.
I guess this modification will not break any working code.
So, normally I would have said that it's too late to do this, but indeed the patch is very small, and if it's not quite as small as you thought, that's because it's required me to fix a few issues with non-default Options in Transform. Unit test expanded.