… refactoring

…rovement); Math.tan(a/2) instead of sin(a), cos(a) increased performance at ~40% on my machine

…eless, and the lists indices are int.

…ultipleLinearRegression. See multiPeriodicFit(...)

…the currently existing one, it is disabled by default and is remained for experimental purposes only.

…ere with each other. Local vars and unique message tags help to avoid this. This problem may occur in the other Period Analysis plug-ins.

…gorithm. It could be set to true at the previous run.

…bled: I'm not sure that the current algorithm fits this variant of the analysis.

…it or not.

…on): in rare cases, equal times may occur in the dataset.

461 spectral window