Clean code
Clean up code a bit more
Pylint Sagui MainWindow
Add menu functions to save and open configuration.

Also cleaned code.
Work on chisquare minimization approach. No definite answer yet.

I have concluded that what I need is a chisquare minimization and
not the fit for only one fit.

Now I am stuck in what would be the proper function to try a
minimization on a loop.
Work on chi^2 minimization.

For fitting t apolynomial with varying degrees, all methods of
chi^2 minimization find the degree set by me.

I still think that there is something odd on this...