19-sep-2006 NvE Accuracy problem solved in Ali3Vector::GetOpeningAngle.

19-sep-2006 NvE Accuracy problem solved in Ali3Vector::GetOpeningAngle.
20-sep-2006 NvE AliSample::GetMedian corrected for empty or single value arrays.
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.