Merge pull request #60 from dgadling/loaded_fix

ParseResource's need to know they've been loaded

parse_rest/datatypes.py

@@ -237,6 +237,7 @@ class ParseResource(ParseBase):
     def _init_attrs(self, args):
         for key, value in six.iteritems(args):
             setattr(self, key, ParseType.convert_from_parse(value))
+        self._is_loaded = True
 
     def _to_native(self):
         return ParseType.convert_to_parse(self)