Pass whole config to Client object

This will serve for future additions of new properties specific to a
`Client`.

backends/transmission.py

@@ -4,14 +4,15 @@
 class Client:
     """Handles connection to torrent client."""
 
-    def __init__(self, host, port):
+    def __init__(self, config):
         """Creates new torrent client connection.
 
         Args:
             host (str): Hostname or IP address where client is litening.
             port (int): Port where client is listening.
         """
-        self.transmission = transmissionrpc.Client(host, port)
+        self.transmission = transmissionrpc.Client(config['host'],
+                                                   config['port'])
 
     def add_torrent(self, torrent, timeout=None, **kwargs):
         return Torrent(self.transmission.add_torrent(torrent, timeout, **kwargs))

tdpt.py

@@ -149,8 +149,7 @@ def main():
     backend_name = CONFIG.get('General', 'backend')
 
     backend = importlib.import_module('backends.' + backend_name.lower())
-    client = backend.Client(CONFIG.get(backend_name, 'host'),
-                            CONFIG.get(backend_name, 'port'))
+    client = backend.Client(CONFIG[backend_name])
 
     init_polling(client)
     torrents_tracked = set()