Move much of our Django support capability detection into support.py.

Review Request #5107 — Created Dec. 13, 2013 and submitted — Latest diff uploaded

Information

Django Evolution
master

Reviewers

Move much of our Django support capability detection into support.py.

There are a few places where we introspect some part of Django to see
what level of support we have for something. Instead of duplicating
these or spreading them around, they've been moved to a new support.py
file.

Unit tests pass.