[bug 920470] Require SSL during entire AAQ workflow.
Fix @ssl_required to look at SESSION_COOKIE_SECURE

Instead of triggering on DEBUG=False, it now triggers on
SESSION_COOKIE_SECURE=True.
[bug 910889] Style the award notification email
Update selenium from 2.33 to 2.35
Add SELENIUM_FIREFOX_PATH for sad-path environments

I have Firefox Nightly earlier in my path than Firefox stable. Nightly
has problems with Selenium that haven't been fixed, yet, (or something
like that). This allows me to specify exactly which Firefox binary to
use without having to fiddle with my PATH environment variable which
caused other problems because of virtual environments and such.

It defaults to exactly what happened before, so if it worked for you
before, you should see no change with this change.
Add age filter default for questions to the search docs.