25-apr-2002 NvE Projectile and target specifications introduced in AliEvent.

25-apr-2002 NvE Projectile and target specifications introduced in AliEvent.
26-apr-2002 NvE AddVetoSignal(AliSignal) introduced in AliCalorimeter and AliCalcluster
                to provide more flexibility and allow automatic calculation of
                hit association confidence level based on position uncertainties.
29-apr-2002 NvE Memberfunction GetNvalues() and copy constructor introduced in AliSignal.
25-jun-2002 NvE Memberfunction SetOwner() introduced in AliJet, AliVertex and AliEvent to allow
                to set ownership of "added objects" in the case of reading data from a file.
                In this way possible memory leaks can always be prevented.
                Also automatic extrapolation and confidence level calculation of associated
                veto hits introduced in AliCalorimeter and AliCalcluster.