05-dec-2003 NvE Memberfunction SetStable introduced in AliCollider for the user's...

05-dec-2003 NvE Memberfunction SetStable introduced in AliCollider for the user's convenience.
08-dec-2003 NvE AliTrack derived from TNamed to enhance labeling flexibility and also specific
                Clone memberfunction introduced to enable storage of derived objects in AliJet & co.
                Also specific Clone memberfunctions introduced for AliJet, AliVertex and AliEvent and
                for the already existing specific Clone memberfunctions the default argument was set
                to the empty string "".
15-dec-2003 NvE Datamembers fNdec and fNsig removed from AliTrack since these data are now retrieved
                directly from the corresponding arrays.
                Support for hypothesis probability introduced in AliTrack and old mass hypothesis
                machinery extended to provide now full track hypotheses.
18-dec-2003 NvE Support for object references from the various signal slots introduced in AliSignal.
                Since this is mainly intended for "backward references" to AliTrack objects,
                the AliTrack class has been slightly updated for this to provide pointer consistency
                in case the corresponding AliTrack object is deleted.