Add SmartHab documentation page (#8647)

* Add SmartHab documentation page

* Use proper placeholders for email and password in SmartHab page

Co-Authored-By: outadoc <outadoc@gmail.com>

* Improve phrasing in SmartHab doc

* Apply suggestions from code review

Co-Authored-By: outadoc <outadoc@gmail.com>

* Remove redirect_from in smarthab.markdown

* Move smarthab ha_release to 0.94

* Remove url configuration from smarthab doc

* ✏️ Tweak

After this I will merge it

source/_components/smarthab.markdown

@@ -0,0 +1,50 @@
+---
+layout: page
+title: "SmartHab"
+description: "Instructions on how to integrate SmartHab devices into Home Assistant"
+date: 2019-02-13 08:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: smarthab.png
+ha_release: 0.94
+ha_category:
+  - Hub
+  - Cover
+  - Light
+ha_iot_class: Cloud Polling
+---
+
+If your home is fitted with [SmartHab](http://www.smarthab.fr/en/home/)'s 
+devices and you have access to their app-based services, you will be able 
+to control your lights and shutters with the SmartHab component for Home 
+Assistant.
+
+Once you have added a `smarthab` entry to your configuration, your supported 
+devices will automatically be discovered and made available on your dashboard.
+
+<p class='note warning'>
+  To prevent being automatically logged out of your SmartHab mobile app, you
+  might want to create a secondary user in the app's settings and grant it
+  access to your home. You can then configure the component using this account's
+  credentials. This is also more secure, as this user should be less priviledged.
+</p>
+
+```yaml
+# Example configuration.yaml entry
+smarthab:
+  email: EMAIL_ADDRESS
+  password: PASSWORD
+```
+
+{% configuration %}
+email:
+  description: The email address of your SmartHab account.
+  required: true
+  type: string
+password:
+  description: The SmartHab account's password.
+  required: true
+  type: string
+{% endconfiguration %}