Merge branch 'jramsay/email-push-docs' into 'master'

Add example email on push notification to docs

See merge request gitlab-org/gitlab-ce!23566

doc/user/project/integrations/emails_on_push.md

 # Enabling emails on push
 
-By enabling this service, you will be able to receive email notifications for
-every change that is pushed to your project.
+By enabling this service, you will receive email notifications for every change
+that is pushed to your project.
 
-Navigate to the [Integrations page](project_services.md#accessing-the-project-services)
-and select the **Emails on push** service to configure it.
+From the [Integrations page](project_services.md#accessing-the-project-services)
+select **Emails on push** service to activate and configure it.
 
 In the _Recipients_ area, provide a list of emails separated by spaces or newlines.
 
-You can configure any of the following settings depending on your preference.
+The following options are available:
 
 + **Push events** - Email will be triggered when a push event is received
 + **Tag push events** - Email will be triggered when a tag is created and pushed
 + **Send from committer** - Send notifications from the committer's email address if the domain is part of the domain GitLab is running on (e.g. `user@gitlab.com`).
 + **Disable code diffs** - Don't include possibly sensitive code diffs in notification body.
 
----
-
-![Email on push service settings](img/emails_on_push_service.png)
+| Settings | Notification |
+| --- | --- |
+| ![Email on push service settings](img/emails_on_push_service.png) | ![Email on push notification](img/emails_on_push_email.png) |