README in activity_notification-2.1.0

- old
+ new

@@ -1,10 +1,14 @@
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-Some setup you must do manually if you haven't yet:
+activity_notification uses internal models for notifications and subscriptions
+  - ActivityNotification::Notification
+  - ActivityNotification::Subscription
 
-  Ensure you have configured model name in your initializer activity_notification.rb.
-  For example:
+  You can use your own models with same database table used by these internal models.
 
-    #TODO
+  Ensure you have configured table name in your initializer activity_notification.rb.
+  For example:
+    config.notification_table_name = "notifications"
+    config.subscription_table_name = "subscriptions"
 
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