improved version for GAUSSFIT() + initial import of "test_gaussfit.pro" #1671
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Hum, the c++ code is far from clean & perfect, but it is working now on Linux & OSX and survive to tens of tests incorporated in new "test_gaussfit.pro" code.
I rewrote completely the function which estimated the guess of parameters. It is not perfect but simple and robust when delta_X are more or less constants. It should survive when the steps in X are constants and the quadradic part is not too strong.
Feedback & problematic cases very welcome (in new issues)
Hum, I forgot to removed DEBUG & cout ...