Uses old Tkinter import
Restores Python 3 Tkinter usage (Tkinter -> tkinter), as well as adding a confirmation for panic.
Makes the confirmation window disabled by default, and optional through settings.
Actually makes the conformation window disabled by default. :)
Fixes accidental deletion in 'os.popen'
Merge pull request #7 from ubudog/master

Adds optional confirmation window (disabled by default)