Add task manager app.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/mailer/queues.py

@@ -0,0 +1,13 @@
+from __future__ import absolute_import, unicode_literals
+
+from django.utils.translation import ugettext_lazy as _
+
+from mayan_task_manager.classes import CeleryQueue
+
+queue_mailing = CeleryQueue(
+    name='mailing', label=_('Mailing')
+)
+queue_mailing.add_task_type(
+    name='mailer.tasks.task_send_document',
+    label=_('Send document')
+)