GSL integrator added - LatAnalyze now depends on GSL
FitInterface: more convenient function to assume correlated data
Plot: code cleaning
DoubleFunctionSample: more call operators
Plot: band plot and terminal option
Plot: caption modifier
DoubleFunction: arithmetic operators
minor code cleaning
more general resampling tool
minor code cleaning
function to read file lists and progress bar class
Plot: function to save plots
MatSample: scalar operators fix
XY*Data: dog is now a double
DoubleFunctionSample: constructor inheritance removed
class for linearly interpolated functions
improvement of Minuit minimizer
missing headers
first root finder class implementation
plot example for tabulated function