0.9.0:
Add support for Django 1.11 and 2.0
Drop unsupported django versions from test matrix (1.9, 1.10)
Add Danish and Ukrainian translations
Rollup the last year worth of minor bug fixes
Better support for Django 1.10
Updated German and French translations
Add Chinese (traditional), Hungarian and Finnish translations
Remove tests folder from package (again.)
Django Models and working with trees of Model instances.
MPTT is a technique for storing hierarchical data in a database. The aim is to
make retrieval operations very efficient.
The trade-off for this efficiency is that performing inserts and moving
items around the tree is more involved, as there's some extra work
required to keep the tree structure in a good state at all times.