Multiple changes:

- Wrap topbar in own class for customization purposes.
- Add stub methods for popup creation
- Add method and shortcut to display the WM class in a notification
- Add keyboard backlight control module, to control my keyboard backlight based on which app has focus
- Add debugging bar to easily display debugging messages
- Add display brightness shortcut keys
- Move some global vars into the theme class
- Lower update intervals for widgets to lower CPU usage
- Add debugging configuration for use with Xephyr

config.py

@@ -109,3 +109,6 @@ def main(qtile):
             qtile.cmd_info()
     else:
         qtile.cmd_warning()
+
+    # Save qtile instance in theme
+    Theme.qtile = qtile