otherwise the urls are not readable, or less readable

otherwise we would get failed links to images that failed
processing

We should make it possible to test the messaging system.

If you look at mediagoblin/utils.py you can see what happens when
we \_activate\_testing() for some other things... ie, we insert
template context info like so:

::

        if TESTS_ENABLED:
            TEMPLATE_TEST_CONTEXT[template_path] = context

Maybe we should do something similar with messaging? Either we
should store in a dictionary like TEMPLATE\_TEST\_CONTEXT, maybe
TEST\_MESSAGES (which gets wiped by clear\_test\_buckets()) or we
should store in the session like request.session['test\_messages']
(should also get wiped by clear\_test\_buckets())

I'm assigning this to Caleb Davis who I think is a good fit for
it.