Add documentation about SCSGate

Signed-off-by: Flavio Castelli <fcastelli@suse.com>

source/_components/rollershutter.scsgate.markdown

@@ -0,0 +1,30 @@
+---
+layout: component
+title: "SCSGate Rollershutter"
+description: "Instructions how to integrate SCSGate motorized devices into Home Assistant."
+date: 2016-01-31 22:16
+sidebar: true
+comments: false
+sharing: true
+footer: true
+ha_category: Rollershutter
+---
+The SCSGate device can control motirized roller shutters connected to the BTicino MyHome system.
+
+To enable SCSGate roller shutters in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+rollershutter:
+  platform: scsgate
+  devices:
+    living_room:
+      name: Living Room
+      scs_id: XXXXX
+```
+
+Configuration variables:
+
+- **devices** (*Required*): A list of devices with their name to use in the frontend.
+
+**Known limitation:** it is not possible to know the current state of the roller shutter.