update README.md according to issue #7

README.md

@@ -24,8 +24,9 @@ def load_config_from_yaml_file(path):
   return return_dict
 
 config = config_provider.ConfigProvider(
-  load_function = load_config_from_yaml_file,
-  path = '/path/to.yml')
+  load_function = {
+    'function': load_config_from_yaml_file,
+    'kwargs': {'path': '/path/to.yml'}})
 
 def do_whatever():
   config = config_provider.ConfigProvider.getInstance()