25-sep-2006 NvE AliSample extended with memberfunction GetSpread() and also

25-sep-2006 NvE AliSample extended with memberfunction GetSpread() and also
                support for providing minimum and maximum values introduced.
12-oct-2006 NvE New memberfunction GetNsignals introduced in AliJet and jet
                ordering w.r.t. number of signals added in AliVertex.
19-oct-2006 NvE AliJet::GetNsignals modified to prevent double counting of
                multiple occurrences of the same signal.
24-oct-2006 NvE AliJet and AliVertex extended with ordering w.r.t. charge.
26-oct-2006 NvE Energy/Momentum scale indicator introduced in AliTrack and AliJet
                and support for chi2 and ndf datamembers removed from AliTrack.
                The latter can be achieved in a more flexible way via the fit
                details facility of AliTrack.
07-nov-2006 NvE Default unit scale changed from cm to meter in AliPosition
                and support introduced for user selectable unit scale
                in retrieval of position coordinates, errors and distances.
08-nov-2006 NvE User selectable unit scale introduced for retrieval of
                physics parameters and distances in AliTrack and AliJet.
                Also the track and jet sorting memberfunctions of AliJet
                and AliVertex have been updated to use this new feature.
                Also AliHelix has been updated to use this new feature and the
                default meter metric scale.
09-nov-2006 NvE AliCollider updated to use new standard 1 meter metric units
                and generator parameters stored in a device named "AliCollider".
                Also beam/target datamembers removed from AliEvent and storage
                of these beam/target parameters performed via a device named "Beam".
10-nov-2006 NvE Bug fixed in AliHelix.cxx such that the original reference point
                of the track itself is not modified when the user had specified
                a different scale. Also GetLastPoint() used in AliHelix to obtain
                the index of the last point instead of relying on the dimension
                of the points array as obtained with GetN(). This increases the
                accuracy of extrapolation (and drawing) resuls since no undefined
                points are now used anymore.
01-dec-2006 NvE AliTimestamp::Add() updated to allow specification of large time differences
                also by giving e.g. only a certain number of seconds instead of explicitly
                giving the time difference in elapsed days, remaining elapsed seconds etc...
                This is very convenient by time manipulations based on GPS data.
                The extension has been realised by just replacing the relevant if()
                statements by while() loops in determining the remaining fractional counts.
                Furthermore, some modulo operations have been introduced to prevent
                integer overflows.
22-sep-2006 NvE IceDwalk extended for specification of maximum number of hits per OM,
                to allow comparison with Sieglinde (which only uses the first OM hit).
                Also IceDwalk now introduces a device into the event named "IceDwalk"
                which contains the values of all the used reconstruction parameters.
25-oct-2006 NvE Spread of Psi median included in track fit statistics of IceChi2
                and IcePandel.
                Processing parameters of IceCalibrate, IceXtalk, IceCleanHits, IceChi2
                and IcePandel included as the corresponding devices in the event structure.
15-nov-2006 NvE Separate treatment of v_phase and v_group introduced in IceDwalk, IceChi2
                and IcePandel to improve time residuals (thanks to George Japaridze).
                Also IceLinefit extended for specification of maximum number of hits per OM
                and automatic introduction of a device into the event named "IceLinefit"
                which contains the values of all the used reconstruction parameters and
                the beta value (v/c) of the reconstructed track.
16-nov-2006 NvE Class IceDwalk renamed to IceDwalkx to provide a Sieglinde-like direct
                walk-II approach. The remaining class IceDwalk will provide a more
                sophisticated approach with more physics driven selection criteria.
23-nov-2006 NvE Improved version of IceDwalk installed. Note that the old algorithm is
                still available as IceDwalkx.
13-sep-2006 NvE IceF2k updated for multiple waveforms per OM by making use of the
                new AliAttrib::AddNamedSlot facility.
                Also some calibration constants dropped from OM data words in IceF2k
                and IceCal2Root, since these values are also stored as parameters in
                the corresponding (de)calibration functions.
                Also for TWR data the values stored in the histos are (baseline-amp),
                so that all pulses appear as positive instead of negative and the
                resulting histos are baseline corrected.
25-oct-2006 NvE IceF2k updated to include an IceF2k device into the event structure
                containing the processor parameters.