extended with options to preserve the waveform histo contents.
These new options are now also used in the SetSignal and SetSignalError
memberfunctions of class AliSignal.
+15-oct-2007 NvE Typo corrected in docs of AliAstrolab.cxx and memberfunctions GetMedian
+ and GetSpread of AliSample.cxx extended for Y-values of histo data.
+09-nov-2007 NvE Graphical skymap facilities introduced in AliAstrolab, based on the
+ work by Garmt de Vries-Uiterweerd.
+09-nov-2007 GdV Automatic central meridian setting only activated when meridian
+ has a value smaller than -pi. This will allow also negative values
+ as user input.
+14-nov-2007 NvE Copy constructor and Clone() memberfunction introduced in AliObjMatrix.
+