FIX: Fix path for JSON registry

mopidy_pummeluff/registry.py

@@ -24,7 +24,7 @@ class RegistryDict(dict):
     which reads and writes the registry from/to disk.
     '''
 
-    registry_path = '/etc/mopidy/pummeluff_cards.json'
+    registry_path = '/var/lib/mopidy/pummeluff/cards.json'
 
     def __init__(self):
         super(RegistryDict, self).__init__(self)
@@ -74,7 +74,13 @@ class RegistryDict(dict):
         '''
         LOGGER.debug('Writing registry to %s', self.registry_path)
 
-        with open(self.registry_path, 'w') as f:
+        config    = self.registry_path
+        directory = os.path.dirname(config)
+
+        if not os.path.exists(directory):
+            os.makedirs(directory)
+
+        with open(config, 'w') as f:
             json.dump(self, f, indent=4)