Thanks Daniel Shapiro.
error when self.name is None
error when importing from fixtures, updated is None
Merge branch 'atkinson'

* atkinson:
  error when importing from fixtures, updated is None
  error when self.name is None
Thanks Rich Atkinson.
Bumped version.
Test showing error when turning a parent node into a child node
Thanks Gordon Cassie.
Fixed TypeError when adding an instance to a collection.
Added tests for moving instances between collections.
Doctests weren't running on Django 1.6.
python 3 comaptibility fix: defined basestring
Merge pull request #27 from Bunkerbewohner/master

python 3 comaptibility fix: defined basestring
Thanks Mathias Kahl.