Change installer

[WhenLifeHandsYouLemons]

Change the installer to use tkinter or maybe even this. I think it should be changed because using the progress bar as a percentage of what's done doesn't work a lot of the time and constantly changes depending on the number of operations pyinstaller does. I think using a loading bar would be better. In tkinter, we can use the ttk.ProgressBar which is just a loading bar.