Pilight binary sensor component (#2325)

* Create binary_sensor.pilight.markdown

* Update binary_sensor.pilight.markdown

* Update binary_sensor.pilight.markdown

* Chg disarm_after_trigger: 'yes' to True

* Update binary_sensor.pilight.markdown

source/_components/binary_sensor.pilight.markdown

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+---
+layout: page
+title: "Pilight Binary Sensor"
+description: "Instructions how to integrate pilight binary sensors within Home Assistant."
+date: 2017-03-24 20:41
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: pilight.png
+ha_category: Binary Sensor
+ha_release: 0.44
+ha_iot_class: Local Poll
+---
+
+This component implement the [pilight hub](https://github.com/home-assistant/home-assistant.github.io/source/_components/pilight.markdown)  binary sensor functionality.
+Two type of pilight binary sensor configuration available. A normal sensor which send the on and off state cyclical and a trigger sensor which send only a trigger when an event happend (for example lots of cheap PIR motion detector) (see example configuration below).
+
+```yaml
+# Example configuration.yml entry
+binary_sensor:
+  - platform: pilight
+    name: 'Motion'
+    variable: 'state'
+    payload:
+      unitcode: 371399
+    payload_on: 'closed'
+    disarm_after_trigger: True  <-- use this if you want trigger type behavior
+```
+
+Configuration variables:
+- **variable** (*Required*): The variable name in the data stream that defines the sensor value.
+- **payload** (*Required*): Message payload identifiers. Only if all identifiers are matched the sensor value is set.
+- **name** (*Optional*): Name of the sensor.
+- **payload_on** (*Optional*): Variable `on` value. The component will recognize this as logical '1'.
+- **payload_off** (*Optional*): Variable `off` value. The component will recognize this as logical '0'.
+- **disarm_after_trigger:** (*Optional*): Configure sensor as trigger type.