+ use getters instead of constants in settings classes
+ refactor previous references
+ move get_xdg_config_dir() from settings.py to app.utils.xdg_utils.py
+ fix bug that caused duplicate artist color entries to db
+ check if app is windows (prep for windows build)
+ remove caribou migrations lib
+ rename all api blueprints to "api"
+ unregister child directories when customizing root dirs
+ misc