Added celery.task.schedules to reference index

docs/reference/celery.task.schedules.rst

@@ -0,0 +1,8 @@
+==========================================================
+ Periodic Task Schedule Behaviors - celery.task.schedules
+==========================================================
+
+.. currentmodule:: celery.task.schedules
+
+.. automodule:: celery.task.schedules
+    :members:

docs/reference/index.rst

@@ -16,6 +16,7 @@
     celery.conf
     celery.task.control
     celery.task.http
+    celery.task.schedules
     celery.signals
     celery.exceptions
     celery.task.builtins