HASSbian documentation (#3063)

* Remove Hassbian

* Replace Hassbian with Hass.io

* Move Hassbian docs to installation folder

* Update navigation

* Update redirects

* Update link

source/_docs/installation/hassbian/upgrading.markdown

@@ -0,0 +1,33 @@
+---
+layout: page
+title: "Upgrading Hassbian"
+description: "Instructions how to upgrade Hasbian to the latest version."
+date: 2016-09-26 21:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+redirect_from: /docs/hassbian/upgrading/
+---
+
+HASSbian is based on Raspbian and uses the same repositories. Any changes to Raspbian will be reflected in HASSbian. To update and upgrade system packages and installed software (excluding Home Assistant) do the following.
+Log in as the `pi` account and execute the following commands:
+
+```bash
+$ sudo apt-get update
+$ sudo apt-get -y upgrade
+```
+
+
+#### {% linkable_title Updating Home Assistant %}
+
+To update the Home Assistant installation execute the following command as the `pi` user.
+
+```bash
+$ sudo systemctl stop home-assistant@homeassistant.service
+$ sudo su -s /bin/bash homeassistant
+$ source /srv/homeassistant/bin/activate
+$ pip3 install --upgrade homeassistant
+$ exit
+$ sudo systemctl start home-assistant@homeassistant.service
+```