Removed deprecated patterns usage

Refs #49.

-from django.conf.urls import patterns, url
+from django.conf.urls import url
 from django.contrib.contenttypes.views import shortcut
 
 from .views.comments import post_comment, comment_done
@@ -7,7 +7,7 @@ from .views.moderation import (
 )
 
 
-urlpatterns = patterns('',
+urlpatterns = [
     url(r'^post/$', post_comment, name='comments-post-comment'),
     url(r'^posted/$', comment_done, name='comments-comment-done'),
     url(r'^flag/(\d+)/$', flag, name='comments-flag'),
@@ -16,9 +16,6 @@ urlpatterns = patterns('',
     url(r'^deleted/$', delete_done, name='comments-delete-done'),
     url(r'^approve/(\d+)/$', approve, name='comments-approve'),
     url(r'^approved/$', approve_done, name='comments-approve-done'),
-)
 
-urlpatterns += patterns('',
-    url(r'^cr/(\d+)/(.+)/$', shortcut,
-        name='comments-url-redirect'),
-)
+    url(r'^cr/(\d+)/(.+)/$', shortcut, name='comments-url-redirect'),
+]

 from __future__ import absolute_import
 
-from django.conf.urls import patterns, url
+from django.conf.urls import url
 from django.contrib.contenttypes.views import shortcut
 
 from django_comments.feeds import LatestCommentFeed
@@ -12,14 +12,13 @@ feeds = {
     'comments': LatestCommentFeed,
 }
 
-urlpatterns = patterns('',
+urlpatterns = [
     url(r'^post/$', views.custom_submit_comment),
     url(r'^flag/(\d+)/$', views.custom_flag_comment),
     url(r'^delete/(\d+)/$', views.custom_delete_comment),
     url(r'^approve/(\d+)/$', views.custom_approve_comment),
+
     url(r'^cr/(\d+)/(.+)/$', shortcut, name='comments-url-redirect'),
-)
 
-urlpatterns += patterns('',
-    (r'^rss/comments/$', LatestCommentFeed()),
-)
+    url(r'^rss/comments/$', LatestCommentFeed()),
+]

-from django.conf.urls import patterns, include
+from django.conf.urls import include, url
 from django.contrib import admin
 from django_comments.admin import CommentsAdmin
 from django_comments.models import Comment
@@ -13,7 +13,7 @@ admin_site2 = admin.AdminSite()
 admin_site2.disable_action('delete_selected')
 admin_site2.register(Comment, CommentsAdmin)
 
-urlpatterns = patterns('',
-    (r'^admin/', include(admin_site.urls)),
-    (r'^admin2/', include(admin_site2.urls)),
-)
+urlpatterns = [
+    url(r'^admin/', include(admin_site.urls)),
+    url(r'^admin2/', include(admin_site2.urls)),
+]

-from django.conf.urls import patterns, include
+from django.conf.urls import include, url
 from django.contrib.auth.views import login, logout
 
 
-urlpatterns = patterns('',
-    (r'^', include('django_comments.urls')),
+urlpatterns = [
+    url(r'^', include('django_comments.urls')),
 
     # Provide the auth system login and logout views
-    (r'^accounts/login/$', login, {'template_name': 'login.html'}),
-    (r'^accounts/logout/$', logout),
-)
+    url(r'^accounts/login/$', login, {'template_name': 'login.html'}),
+    url(r'^accounts/logout/$', logout),
+]