Add multiple trash can support, restoring and complete source object manager and queryset method substitution

apps/trash/urls.py

@@ -1,4 +1,7 @@
 from django.conf.urls.defaults import patterns, url
 
 urlpatterns = patterns('trash.views',
+    url(r'^list/$', 'trash_can_list', (), 'trash_can_list'),
+    url(r'^trash_can/(?P<trash_can_pk>\d+)/items/$', 'trash_can_items', (), 'trash_can_items'),
+    url(r'^trash_can/item/(?P<trash_can_item_pk>\d+)/restore/$', 'trash_can_item_restore', (), 'trash_can_item_restore'),
 )