Space deformation interface: add functions deform(V::AbstractSpace, mapping), deform(V::AbstractSpace, new_points::NTuple{D,AbstractVecOrMat}). The latter shall accept, rather than a mapping, a tuple of vector/matrix of new points, where matrix columns correspond to different mappings
Space deformation interface: add functions deform(V::AbstractSpace, mapping), deform(V::AbstractSpace, new_points::NTuple{D,AbstractVecOrMat}). The latter shall accept, rather than a mapping, a tuple of vector/matrix of new points, where matrix columns correspond to different mappings