added a flag telling whether this is normalised or  normalised gauss and the getter
reading normalised gauss switch from config
removed normalised gauss and breit wigner functions declarations
unified normalised and non-normalised gauss as one function
removed normalised gaussian from getters
setting the global pointer in class constructor
removed setting the global pointer from the main function, moved to the class constructor
gauss is not in the list of root functions - it's using gaus
drawing contour and printing canvas only if the pointer is not null
introduced fDrawCovarianceEllipses variable
setting fDrawCovarianceEllipses to false by default - in constructor
setting fDrawCovarianceEllipses to true if given on the config file; drawing ellipses only in that case
changed the  starting value for nevents - gauss
changed the default number of contour points to 100
changed parameter definition in the config file for covariance ellipse - start from 1, not from zero
subtracting 1 from parameter number values, so that they correspond to c++ definition to start from 0 - in the config they start from 1
parameter definitino
fixed fixing parameters