oops fixed TimeLog tjp representation again
implemented Task.review_set()
0.2.6.4
=======

* **New:** Added a ``Task.review_set(review_number)`` method to get the desired
  set of reviews. It will return the latest set of reviews if ``review_number``
  is skipped or it is None.

* **Update:** Removed ``Task.approve()`` it was making things complex than it
  should be.