for more sophisticated reconstruction algorithms.
Also expression for "ksi" corrected to correctly represent the traveled
distance of the cherenkov photon in IcePandel.cxx.
+27-sep-2007 NvE Check for event selection/rejection flag introduced in IceCalibrate.cxx,
+ IceChi2.cxx, IceCleanHits.cxx, IceDwalk.cxx, IceDwalkx.cxx, IceLinefit.cxx,
+ IceMakeHits.cxx, IcePandel.cxx and IceXtalk.cxx.