Add template sensor docs

source/_components/sensor.template.markdown

@@ -0,0 +1,36 @@
+---
+layout: component
+title: "Template sensor"
+description: "Instructions how to integrate Template sensors into Home Assistant."
+date: 2016-01-27 07:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+ha_category: Sensor
+---
+
+The `template` platform supports sensors which breaks out `state_attributes` from other entities.
+
+To enable Template sensors in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  platform: template
+  sensors:
+    solar_angle:
+      value_template: '{{ states.sun.sun.attributes.elevation }}'
+      friendly_name: 'Sun angle'
+      unit_of_measurement: 'degrees'
+    sunrise:
+      value_template: '{{ states.sun.sun.attributes.next_rising }}'
+```
+
+Configuration variables:
+
+- **sensors** array (*Required*): List of your sensors.
+  - **friendly_name** (*Optional*): Name to use in the Frontend.
+  - **unit_of_measurement** (*Optional*): Defines the units of measurement of the sensor, if any.
+  - **value_template** (*Optional*): Defines a [template](/getting-started/templating/) to extract a value from the payload.
+