Removed some old commented code, changed a few comments. Introduced a new Settings class to handle loading per user settings from a configuration file in /etc/marcdm/. Right now it only supports two settings, default_session and background. Included a barebones marcdm.conf file. Login prompt can now have a background image in place of the default qt5 widget theme. Included a service file for users if they want to use the program as their display manager.