Adapt to 'final' Calo{Cluster,Hypo} without clone()
- have PFCaloCluster point to a CaloCluster instead of inheriting from it, and adapt the ParticleFlow code to this change.
- prefer CaloCluster copy constuctor instead of 'clone' (which is not needed, as CaloCluster is not used as base class -- except for PfCaloCluster, until this commit ;-)
Edited by Marco Cattaneo