4teamwork/opengever.core — pull request #466 by phgross (2014-08-07 13:44:15+00:00)
Title: Fixed seralization error in responsetransporter, when changes containing dates.

When a deadline of a multiclient task is modified before accepted. The copy from one mandant to the other fails with the following traceback.
```
Module zope.publisher.publish, line 113, in debug_call
Module opengever.task.transporter, line 231, in render
Module opengever.task.transporter, line 107, in extract_responses
Module json, line 231, in dumps
Module json.encoder, line 201, in encode
Module json.encoder, line 264, in iterencode
Module json.encoder, line 178, in default
TypeError: datetime.date(2014, 8, 5) is not JSON serializable
```

The reason for this problem was that the ResponseTransporter encoded the values of dict not separately.

@lukasgraf please have a look...