Update django and requests versions

Django should be at 1.4.3 because that's the latest security patch
release. Having said that, it's in playdoh-lib, so I'm not sure why
it's here, too.

Updating requests to a more recent version so it satisfies the
requirements for pyelasticsearch which is now used by elasticutils
master tip. I ran the django-browserid tests with requests 1.1 and
they passed. I don't see anything else funfactory/playdoh-wise that
requires requests.

r?