For #95. You can now make posts with no text in the body if you have attachments. And now if you create a new topic with an attachment, and the POST fails (say you forgot the topic title), we will now re-attach attachments. Also fixed a bug in the smiley code that would arise if it was asked to markup an empty string.

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

urlpatterns = patterns('podcast.views',
   url(r'^$', 'index', name='podcast-main'),
   (r'^(\d+)/$', 'detail'),
   (r'^feed.xml/$', 'feed'),
)