code cleanup.

moved process_comic_book to static method.

comic/urls.py

@@ -7,5 +7,4 @@ urlpatterns = [
     url(r'^(?P<comic_path>[\w]+)/$', views.comic_list, name='comic_list'),
     url(r'^read/(?P<comic_path>[\w]+)/(?P<page>[0-9]+)/$', views.read_comic, name='read_comic'),
     url(r'^read/(?P<comic_path>[\w]+)/(?P<page>[0-9]+)/img$', views.get_image, name='get_image'),
-
-]
+]