Sounds of “click” and “beep” were added to show subject the
data-collection process and finishing respectively;
List of relative motions are updated with “back to” the original state;
Finished state of activity will be saved if no redo button was pressed;
Prof. Suggestions are fixed

The subject_***** folder will be created after inputing the subject’s
information and press “Next”;
The subject folder remains the same one only if:
    1. User kills the app in some way;
    2. User finished all the activity and press “Finish Test” and press
“Yes” after that;
    3. User exists the app from the information page with “Notice”
dialog;
If any activity is finished successfully, the state will be saved
unless the three above happened;