Add Bbox platform for tracking device documentation (#1236)

source/_components/device_tracker.bbox.markdown

@@ -0,0 +1,35 @@
+---
+layout: page
+title: "Bbox"
+description: "Instructions how to integrate Bouygues Bbox routers into Home Assistant."
+date: 2016-10-13 23:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: bbox.png
+ha_category: Presence Detection
+ha_release: "0.31"
+---
+
+
+The `bbox` platform offers presence detection by looking at connected devices to a [Bbox](https://fr.wikipedia.org/wiki/Bbox) based router from Bouygues company, which is one of the main Internet provider in France.
+
+<p class='note'>
+Bbox is a generic name for different hardware router. The platform has only been tested on a Sagem F@st 5330b because it's the only model the developer owns. 
+</p>
+
+To use an Bboox router in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+device_tracker:
+  - platform: bbox
+```
+
+<p class='note warning'>
+For now and due to third party limitation, the Bbox must be on the same local network as the Home Assistant installation. And with the default IP configuration (IP of the box must be 192.168.1.254)
+</p>
+
+See the [device tracker component page](/components/device_tracker/) for instructions how to configure the people to be tracked.
+