Refactor RateLimiter so that if Redis is not running, everything still runs normally (minus the rate limiting protection). My assumption that creating a Redis connection would throw an exception if Redis wasn't running was wrong. The exceptions actually occur when you issue a command. This is for #224.

"""URLs for the antispam application."""
from django.conf.urls.defaults import *

urlpatterns = patterns('antispam.views',
    url(r'^suspended/$', 'suspended', name='antispam-suspended'),
)