The GUI Version is now fully functional and integrated into RST_Func. To start the GUI-based picking use `python3 RST_pick_GUI.py`. When using the default options it is equivalent to RST_main.py. - Added more default options to the config. - Extended the `eval_shearstress` function by the option to review picks - Changed the convention of DocStrings from single to double quotes. - Added DocStrings to some functions.