WIP: euler rigid changes in BFitHelperTmp class
WIP: add Euler3DTransformType definition
WIP: add convert functions for eulerRigid
WIP: replace versorRigid3D by Euler3D in genericTransformImage filter
WIP: replace versor with Euler in inPlaceResampleFilter
WIP: replace versor with Euler in inPlaceFilterTest
WIP: add Euler3D to ConvertToRigidAffine filter