Add twitch docs

source/_components/sensor.twitch.markdown

@@ -0,0 +1,32 @@
+---
+layout: component
+title: "Twitch sensor"
+description: "Instructions how to integrate Twitch sensors into Home Assistant."
+date: 2015-12-19 09:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: twitch.png
+ha_category: Sensor
+---
+
+
+The `twitch` platform will allow you to monitor your downloads with [Twtich](http://www.twitch.tv/) from within Home Assistant and setup automation based on the information.
+
+To use Twitch with your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  platform: twitch
+  channels:
+    - channel1
+    - channel2
+```
+
+Configuration variables:
+
+- **channels** array (*Required*): Array of channels.
+  - **channel_name** (*Required*): Name of the channel.
+