Release v1.4.0-beta-1

• The code has been changed, now it mostly uses classes (class).
• New features:
  • Autocomplete:
    • An automatic pop-up list box with Python keywords that matches the keyword that you're currently typing.
  • Settings:
    • Highlighting Python is now customizable
    • Change the text editor's font
    • Set line number's numbers on the right or left of the widget
• Removed features (will be returned soon):
  • Files explorer
  • Notifier from the status label
  • Packages installer
• Bug fixes:
  • The class Thread never stops, even target (function) is completed.
  • The app crashes when the config file isn't found.