Add usage linking to notify components (home-assistant#2267)

patock · fabaff · commit 05d3796c2a2b · 2017-03-16T07:26:16.000+01:00
Added a note linking to the notification components for SMS and Phone, since additional configuration is required to get twilio working other than just getting the account SID and token placed in the config.
diff --git a/source/_components/twilio.markdown b/source/_components/twilio.markdown
@@ -31,3 +31,5 @@ Configuration variables:
 - **account_sid** (*Required*): Your Twilio Account SID which can be found in your [console](https://www.twilio.com/console). It starts with the letters `AC`.
 - **auth_token** (*Required*): Your Twilio Account SID which can be found in your [console](https://www.twilio.com/console). It should be directly under where you found the `account_sid`.
 
+### {% linkable_title Usage %}
+After configuring the base Twilio component, add and configure either or both of the [twilio SMS](https://home-assistant.io/components/notify.twilio_sms/) and [twilio Phone](https://home-assistant.io/components/notify.twilio_call) components to utilize the notification functionality.
