* Always_underscore_variable_names, no CamelCase.

* Don't leave commented out code lying around.

* Use the Logger instead of print statements.

* Lines shouldn't be longer than 80 characters.

* Docstrings on class members.

* Don't let gsettings leak out of the Config singleton. Don't use gsettings
directly in any other class.

* Call "./setup.py build_i18n -m" to merge code changes into .po files.