Fix the PeriodicLineNeighborhoodTest.

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
Fledh and rework the MorpgologyUtils class.

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
Implement all 12 methods for TopHat class.

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>