R/curveFit_utils.R
    skewedGaussian_guess.RdGuess function for initial skewed gaussian parameters and bounds, at the moment only checks the x position
skewedGaussian_guess(x, y)(numeric) x values (e.g. retention time)
(numeric) y observed values (e.g. spectra intensity)
A list of guessed starting parameters list()$init_params,
lower list()$lower_bounds and upper bounds list()$upper_bounds
($gamma, $center, $sigma, $amplitude)