different calorimeter systems in an event structure.
Storage of jets introduced in AliVertex on the same footing as the
storage of (secondary) vertices.
+04-jul-2001 NvE Storage of calorimeters introduced in AliEvent and ResetVertices()
+ added to AliVertex.
+05-jul-2001 NvE Clone() facility used in AddTrack() etc... of AliEvent & co. instead of
+ "new" in the case of TrackCopy etc... This in order to enable 'permanent'
+ AliTrack etc... storage in AliEvent & co.
+ Also (Ali4Vector&) casting stmt. in AliVertex::ResetVertices() changed
+ to make it ANSI compatible for all compilers/platforms.
+09-jul-2001 NvE Support for impact points and user identifier introduced in AliTrack.
+ Also user identifier facility introduced for AliJet and AliVertex.
+12-jul-2001 NvE Memberfunction GetDistance() introduced for AliPosition and support for
+ point of closest approach introduced in AliTrack.
+24-jul-2001 NvE Support for Chi2 and NDF information of track fit introduced in AliTrack.
+01-dec-2001 NvE SetOwner() introduced for certain TObjArray's in AliCalcluster, AliEvent,
+ AliInvmass, AliJet, AliTrack and AliVertex to adapt to the new memory
+ management of ROOT 3.01 (and later) in case of reading trees.
+06-dec-2001 NvE Memory usage optimised for AliVertex & co. and memory leak due to
+ cloning solved.
+07-dec-2001 NvE ClassDef() and ClassImp() statements introduced for AliSample.
+17-dec-2001 NvE Copy constructor and Init() memberfunction introduced for AliTrack & co.
+14-jan-2002 NvE New schema evolution activated via the "+" behind the classnames
+ in RALICELinkDef.h. Note that the new schema evolution only works
+ correctly for ROOT version 3.02/07 and later.
+14-feb-2002 NvE Support for name tag introduced in AliSignal to indicate the kind of signal.
+ Missing comment lines added in SetName() and GetName() of AliCalorimeter and AliSignal.