12-sep-2006 NvE Memberfunctions GetNslots and AddNamedSlot introduced and various

12-sep-2006 NvE Memberfunctions GetNslots and AddNamedSlot introduced and various
                modifications made in AliAttrib and AliSignal to overcome a ROOT
                feature which always sets the size of TArray objects to a default
                of 16 when reading these objects back from a file.
                The modified AliAttrib and AliSignal don't rely on a GetSize()
                anymore, but determine the number of stored values from the
                actual array contents.
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.
14-sep-2006 NvE IceCalibrate.cxx updated to correctly process multiple waveforms and hits per OM.
                Also some calibration constants dropped from OM data words in IceCalibrate,
                since these values are also stored as parameters in the corresponding
                (de)calibration functions.