Refactor/django 1.11

Django 1.11 LTS is out, lets do some upgrade!

Notes

• Seeing poor load performance when debug toolbar template inspector is enabled. See https://github.com/jazzband/django-debug-toolbar/issues/910.

TODO

• Remove dependence on bootstrap_toolkit, causing context errors
• CHANGELOG entry
• Login via email is broken

Weirdness in actstream versioningy

Seeing this, really not sure why.