Improve model conversion to trashable, update initial migration

apps/trash/post_init.py

@@ -0,0 +1,19 @@
+from __future__ import absolute_import
+
+from django.utils.translation import ugettext_lazy as _
+
+from navigation.api import bind_links
+
+from .links import trash_can_list, trash_can_items, trash_can_item_restore, trash_can_item_delete
+from .models import TrashCan, TrashCanItem
+
+
+def init_create_trash_cans():
+    model_set = [('documents.Document', _(u'Documents')), ('folders.Folder', _(u'Folders')), ('taggit.Tag', _(u'Tags'))]
+    for model_info in model_set:
+        TrashCan.objects.make_trashable(*model_info)
+
+
+bind_links(['trash_can_list', TrashCan], trash_can_list, menu_name='secondary_menu')
+bind_links([TrashCan], trash_can_items)
+bind_links([TrashCanItem], [trash_can_item_restore, trash_can_item_delete])