Rdmo

* fix snapshot rollback

* move test mixins to django-test-generator
* refactor tests

* fix for value_and_unit
* fix for tasks date
* fix for render_to_format title
* upgrade to Django 1.11.1

* add programmable api
* add authtoken from rest_framework
* refactor urls, views and viewsets
* refactor tests

* refactor tasks
* bug fixes and polishing

* add documentation
* refactor authentication, make allauth optional
* migrate to Django 1.10, update other requirements
* clear cache on changes in projects/questions

Use


pip install -r requirements/base.txt


to update Django and the other requirements. Then run:


python manage.py migrate
python manage.py deploy