Transform to map stasm points back into original coordinate space

We often use an eye detector to align the image to the stasm mean shape by performing an affine transform on the image. The result is the the stasm landmarks are in the image coordinate space of the transformed image. In some cases we want these coordinates in the original image space. This transform will map the landmarks back into this space so long as the `Affine(storeTransform=true)` is set. 
I think all the parameters to these new eigenutils functions can be passed by const reference?