31-may-2007 NvE Memberfunctions GetNdevices, GetIdDevice and ShowDevices of AliEvent

31-may-2007 NvE Memberfunctions GetNdevices, GetIdDevice and ShowDevices of AliEvent
                extended to select device classes.
01-jul-2007 NvE Memberfunction GetString() introduced in class IceGOM.
                IceCalibrate.cxx and IceXtalk.cxx updated to support both the old (MuDaq only)
                and new (MuDaq, TWRDaq, ...) calibration file format.
                Also isolation cut in IceCleanHits modified to ignore hits from
                the same OM.
01-jul-2007 NvE Class IceCal2Root extended to support various databases (e.g. MuDaq, TWRDaq, ...).