Drop 1.10 and below?

[tony]

source: https://docs.djangoproject.com/en/2.0/releases/2.0/

Following the release of Django 2.0, we suggest that third-party app authors drop support for all versions of Django prior to 1.11. At that time, you should be able to run your package’s tests using python -Wd so that deprecation warnings do appear. After making the deprecation warning fixes, your app should be compatible with Django 2.0.

Backstory is Django 1.11 is LTS (Supported until April 2020).

[tony]

Another benefit is this makes the testbed faster and maintenance easier as time goes by. 1.11 is a LTS support release.

I'm going to preliminarily rm 1.10 and below from tox/travis in my branch. If it's not agreed upon, I'll rebase the change out.