Add feature freeze notice to readme

README.md

@@ -9,6 +9,13 @@ Read the [FAQ](https://github.com/swaywm/sway/wiki). Join the
 [IRC channel](http://webchat.freenode.net/?channels=sway&uio=d4) (#sway on
 irc.freenode.net).
 
+**Notice**: Sway is currently *frozen* and no new features are being shipped
+until we finish integrating Sway and  wlroots. Bug fixes are still going out.
+for more information, [see this
+article](https://drewdevault.com/2017/10/09/Future-of-sway.html). To follow
+wlroots integration status, [see this
+ticket](https://github.com/swaywm/sway/issues/1390).
+
 [![](https://sr.ht/ICd5.png)](https://sr.ht/ICd5.png)
 
 If you'd like to support Sway development, you can contribute to [SirCmpwn's