Add broadlink sensor support (#1457)

* Add broadlink sensor suport

* Add ha_release

source/_components/sensor.broadlink.markdown

@@ -0,0 +1,58 @@
+---
+layout: page
+title: "Broadlink RM2 and A1 sensor"
+description: "Instructions how to integrate Broadlink RM2 and/or A1 E-air sensors within Home Assistant."
+date: 2016-11-08 21:59
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: broadlink.png
+ha_category: Sensor
+ha_release: 0.34
+---
+
+
+The `broadlink` sensor platform let you monitor data from an RM2 and A1 E-air. 
+There is currently no support for the cloud API.
+
+To set it up, add the following information to your `configuration.yaml` file:
+
+Obtain sensor data from an A1:
+```yaml
+sensor:
+    platform: broadlink
+    update_interval: 60
+    host: IP_ADDRESS
+    mac: 'MAC_ADDRESS'
+    monitored_conditions:
+      - temperature
+      - humidity
+      - air_quality
+      - light
+      - noise
+```
+
+Obtain temperature data from an RM2:
+```yaml
+sensor:
+    platform: broadlink
+    update_interval: 60
+    host: IP_ADDRESS
+    mac: 'MAC_ADDRESS'
+    monitored_conditions:
+      - temperature
+```
+
+Configuration options:
+- **name** (*Optional*): Default BL. Sensor name
+- **update_interval** (*Optional*): Default 300. Time in seconds to fetch data from sensors
+- **host** (*Required*): The hostname/IP address to connect to.
+- **mac** (*Required*):  Device mac address.
+- **monitored_conditions** array (*Required*): States to monitor.
+    - 'temperature'
+    - 'humidity'
+    - 'air_quality'
+    - 'light'
+    - 'noise'
+