Fixes transactions in django 1.6
Includes jqTree 0.9 using a git submodule instead of a copy.
Merge pull request #10 from BertrandBordage/master

Includes jqTree 0.9 using a git submodule instead of a copy.
Merge remote-tracking branch 'floppya/django-1.6-transactions'

Fix Django 1.6 transactions
Update CHANGELOG