hmarr/mongoengine — pull request #574 by wpjunior (2012-10-26 19:45:27+00:00)
Title: Method to defines a new counter.

Added method in SequenceField to defines a new counter.
for in exemple:

```python
class Ticket(Document):
cod = SequenceField()
...

Ticket.cod.set_next_value(1000)
```