pipenv: Pre-migration to pipenv things

- Use an alternative xdg module that provides functions to generate XDG-paths.
  - Fix startup routines for the main configurator.

g13gui/common.py

@@ -1,10 +1,7 @@
 #!/usr/bin/python
 
-import os
-import os.path
-import xdg.BaseDirectory as basedir
+from xdg import xdg_config_home
 
 PROGNAME = 'g13gui'
 VERSION = '0.1.0'
-PROFILES_CONFIG_PATH = os.path.join(basedir.save_config_path('g13', 'g13gui'),
-                                    'profiles.json')
+PROFILES_CONFIG_PATH = xdg_config_home() / 'g13' / 'g13gui' / 'profiles.json'

g13gui/main.py

@@ -12,3 +12,7 @@ def main():
 
     app = Application()
     app.run(sys.argv)
+
+
+if __name__ == '__main__':
+    main()