The migration support recently added was built to work with the modern

functions and classes introduced in Django 1.10. Older versions had

different requirements in terms of the steps that needed to be

performed and the parameters that various functions took.
This change adds compatibility for Django 1.7 through 1.11. It also

appears to work in 2.0, but we are not currently guaranteeing any

support there.

Unit tests pass on Django 1.6 through 1.11.