Update README.md

Author: kpgalligan

README.md

@@ -59,9 +59,10 @@ far better than I ever will.
 ## Usage
 
 If properly set up, you should be able to add Kotlin source to Xcode, set up breakpoints, and step through code.
-Be careful not to have Kotlin source added to the iOS Bundle output.
 
-To help automate adding Kotlin source, check out the [Kotlin Xcode Sync](https://github.com/touchlab/KotlinXcodeSync) Gradle plugin.
+We're deprecating the Xcode Sync plugin. Add folder reference instead! [See issue](https://github.com/touchlab/xcode-kotlin/issues/16). Description and video coming soon.
+
+~~To help automate adding Kotlin source, check out the [Kotlin Xcode Sync](https://github.com/touchlab/KotlinXcodeSync) Gradle plugin.~~
 
 ### Sample