07-oct-2003 NvE Arguments of SetSignal and AddSignal memberfunctions of AliCalmodule...

07-oct-2003 NvE Arguments of SetSignal and AddSignal memberfunctions of AliCalmodule corrected
                to comply with the corresponding virtual functions of AliSignal.
                AliCalorimeter modified accordingly.
09-oct-2003 NvE Argument of all MakeCopy memberfunctions removed to obey the ANSI C++ rules for
                virtual functions and to prepare for a common base class.
                Due to the fact that not all compilers seem to accept the standard ANSI rule
                that a virtual function is allowed to differ in return type from the corresponding
                virtual function in the base class, the MakeCopy() memberfunctions have all been
                given a return type of TObject*.
                Also AliAttrib::Data renamed to AliAttrib::List to prevent violation of ANSI virtual
                function rules and class AliSignal updated accordingly.
                Memberfunction ResetPosition() moved from AliSignal to AliPosition.
                Explicitly declared all memberfunctions virtual in the derived classes in case
                the corresponding memberfunctions were also declared virtual in the base class.
                Various memberfunctions which were declared virtual but were actually not meant
                to be overridden declared as non-virtual in various low-level classes like
                Ali3Vector, Ali4Vector, AliPosition etc...
13-oct-2003 NvE Argument 'npt' of AliCollider::MakeEvent also made optional.
24-oct-2003 NvE Private memberfunction Dump of AliTrack and AliVertex renamed to Dumps in order
                not to override the Dump memberfunction of TObject.
                Also definition of AliVertex::Draw slightly modified to comply with the standard
                ANSI virtual function rules concerning TObject::Draw.
                Invokation of ClassName() used in printout of AliSignal::Data to make the output
                information more generic.
25-oct-2003 NvE Memberfunction AddCalorimeter of AliEvent replaced by memberfunction AddDevice
                to make the functionality more generic.
                To comply with the enhanced flexibility of AliEvent::AddDevice the class
                AliCalorimeter has been derived from TNamed and the MakeCopy() memberfunction
                has been replaced by Clone() to override the default one of TNamed.
                The specific GetName and SetName memberfunctions of AliCalorimeter have been removed.
26-oct-2003 NvE Class AliSignal derived from TNamed and MakeCopy() memberfunction replaced by Clone()
                like was done for AliCalorimeter.
                The latter was also done for AliCalmodule and AliAttribObj.