gui.py update
add: printlog gui moulde
Testing a new window
U: update a new window
A: window focusing
U: for efficiency the code converted to class
A: scrolledtext for backupfile

rename: main.py -> rankchanger.py
A: printing the execution results
A: menu
A: process manager
D: process manager

Fix: StringIO

U: text scroll
A: icon
version 1.0