Added possibility of saving 3D gauss grid data in MultiDimGauss class.
Added maxRange const in PointValue and ensured value will never go out of this range.
Modified parameters, added reachable value as goal.
Test program for gsl_addon generates valid grid data for gnuplot.
Added gnuplot input for generating gauss isolines from grid data file.
Moved GaussIsolines script to newly created presentation directory.