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.

"""Admin definitions for the antispam application."""

from django.contrib import admin

from antispam.models import SpamPhrase


class SpamPhraseAdmin(admin.ModelAdmin):
    search_fields = ('phrase', )


admin.site.register(SpamPhrase, SpamPhraseAdmin)