Add hyperstack support to Ellipsoid Factor

[rimadoma]

Ellipsoid Factor could relatively easily support hyperstack by dividing them into X, Y, Z 3D subspaces with the help of HyperstackUtils.split3DSubspaces. See e.g. ConnectivityWrapper for reference.

NB

BoneJ2/Modern/wrapperPlugins/src/main/java/org/bonej/wrapperPlugins/EllipsoidFactorWrapper.java

Line 241 in 6a3723a

imgPlus.setAxis(inputImgPlus.axis(dim), dim);

doesn't work correctly, because the canonical order of axes is {x, y, c, z, t}.