Added documentation for Canary (#4162)

* Added documentation for Canary

* Addresses PR comments

* Addressed PR comments

* Addressed PR comments

source/_components/canary.markdown

@@ -0,0 +1,53 @@
+---
+layout: page
+title: "Canary"
+description: "Instructions on how to integrate your Canary devices into Home Assistant."
+date: 2017-12-07 22:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: canary.png
+ha_category: Hub
+ha_release: "0.60"
+ha_iot_class: "Cloud Polling"
+---
+
+The `canary` component allows you to integrate your [Canary](https://canary.is) devices in Home Assistant.
+
+You will need your Canary login information (username, usually your email address, and password) to use this module.
+
+To set it up, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+canary:
+  username: you@example.com
+  password: secret
+```
+
+{% configuration %}
+  username:
+    description: The username for accessing your Canary account.
+    required: true
+    type: string
+  password:
+    description: The password for accessing your Canary account.
+    required: true
+    type: string
+  timeout:
+    description: Timeout to wait for connections.
+    required: false
+    type: int
+    default: 10
+{% endconfiguration %}
+
+
+
+Once loaded, your front end will have the following components:
+
+* A camera image triggered by motion for each camera.
+* An alarm control panel for each location.
+* A sensor per camera that reports temperature.
+* A sensor per camera that reports humidity.
+* A sensor per camera that reports air quality.