add doc for zha fans (#4626)

* add doc for zha fans

* add ha_release

source/_components/fan.zha.markdown

@@ -0,0 +1,16 @@
+---
+layout: page
+title: "ZigBee Home Automation Fan"
+description: "Instructions how to setup ZigBee Home Automation fans within Home Assistant."
+date: 2018-02-10 00:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: zigbee.png
+ha_category: Fan
+ha_iot_class: "Local Polling"
+ha_release: 0.66
+---
+
+To get your ZigBee fans working with Home Assistant, follow the instructions for the general [ZigBee Home Automation component](/components/zha/).

source/_components/zha.markdown

@@ -22,6 +22,7 @@ There is currently support for the following device types within Home Assistant:
 - [Sensor](../sensor.zha) (e.g. temperature sensors)
 - [Light](../light.zha)
 - [Switch](../switch.zha)
+- [Fan](../fan.zha)
 
 Known working ZigBee radios: