Fix warning for yaml.load()

https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load(input)-Deprecation

tivomirror.py

@@ -63,7 +63,7 @@ class Config:
 	def load(self, file):
 		file = os.path.expanduser(file)
 		with open(file, 'r') as f:
-			y = yaml.load(f)
+			y = yaml.safe_load(f)
 
 		for key in y:
 			setattr(self, key, y[key])