Added .rst file for celery.signals

docs/reference/celery.signals.rst

@@ -0,0 +1,8 @@
+========================================
+Signals - celery.signals
+========================================
+
+.. currentmodule:: celery.signals
+
+.. automodule:: celery.signals
+    :members:

docs/reference/index.rst

@@ -13,6 +13,7 @@
     celery.result
     celery.task
     celery.registry
+    celery.signals
     celery.task.builtins
     celery.task.strategy
     celery.discovery