Broke up gp.py and changed some getter/setters to properties

Author: ValentijnvdBeek

clay/core/__init__.py

@@ -3,4 +3,4 @@
 from .log import logger
 from .settings import settings_manager
 from .osd import osd_manager
-from .mpris2 import MPRIS2
+from .mpris2 import mpris2_manager