Fix extensions support on Django 1.7+.
Review Request #7420 — Created June 13, 2015 and submitted — Latest diff uploaded
This fixes the extension cache clearing and other compatibility issues hit with newer versions of Django. We were using some private APIs in earlier versions of Django, which have been replaced (largely by proper APIs) in newer versions of Django. The old template loader has been marked deprecated, and will be removed in a future release. The loader will now show a warning when in use. Documentation has been added to cover this.
Related unit tests pass on Django 1.6 and 1.8.