myusuf3/delorean — pull request #6 by mgrouchy (2013-01-07 00:27:57+00:00)
Title: Shift dates

in the format of:

```python
delorean_obj.next_friday()
delorean_obj.last_week()
delorean_obj.next_month()
delorean_obj.next_year()
delorean_obj.last_month()
```