Redirect to ktor-io for older versions

See Kotlin#105

Author: martinbonnin

README.md

@@ -8,7 +8,7 @@ and performing other low level operations.
 ![Experimental](https://img.shields.io/badge/kotlinx-experimental-orange.svg?style=flat)
 [![Download](https://api.bintray.com/packages/kotlin/kotlinx/kotlinx.io/images/download.svg) ](https://bintray.com/kotlin/kotlinx/kotlinx.io/_latestVersion)
 
-NOTE: This library is *experimental*. Any API is a subject to change.
+NOTE: master contains version 0.2.x and is *experimental*. Any API is a subject to change. If you're looking for multiplatform releases of older versions, you can check [ktor-io](https://github.com/ktorio/ktor/tree/master/ktor-io). See https://github.com/Kotlin/kotlinx-io/issues/54 for more details.
 
 # Structure