update jingo==0.7 and jinja2==2.7.2 (bug 963513)
Merge pull request #1740 from magopian/update-jingo

Update Jingo to 0.7 and Jinja2 to 2.7.2 (bug 963513)
Exclude django-debug-toolbar from jingo loader (bug 963513)
Remove mkt/ stuff from Olympia, first pass (bug 973150)

Some broken tests around search and indexing locally, but at least
the tests do run and most of them pass.