11-02-2018: New realese: bugs fixed, vignettes added, general code cleanup performed. 04-10-2018: UI is imporved. Manuals are rechecked. 03-31-2018: Forced interactive launch function is now added. Minor errors are fixed. 03-26-2018: A minor error in the examples is resolved. 03-20-2018: The new release contains auxilary functions for manual ROI processing. 03-16-2018: The very first version of xROI R package is just released!