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!