Copy rollershutter and garage_door docs to cover

Re: home-assistant/home-assistant#1949

source/_components/cover.wink.markdown

@@ -0,0 +1,28 @@
+---
+layout: page
+title: "Wink Cover"
+description: "Instructions how to setup the Wink garage doors within Home Assistant."
+date: 2016-06-28 17:30
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: wink.png
+ha_category: Cover
+---
+
+Wink cover / garage door functionality is currently limited to view only. Wink
+garage doors will still show the current state of the door, but control has
+been disabled for third parties. If you have a Chamberlain garage door, and
+would like to control it via Home Assistant, please contact Chamberlain and
+request that they re-enabled third-party control.
+
+The following quote is from Wink.
+
+> As part of our agreement with Chamberlain, third-party access to control
+  Chamberlain garage doors has been restricted. Please contact Chamberlain
+  directly to inquire about permissions.
+
+~~The Wink garage door platform allows you to control your [Wink](http://www.wink.com/) enabled garage door.~~
+
+The requirement is that you have setup your [Wink hub](/components/wink/).