Deprecation notice

Author: Brutus5000

README.MD

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+**Deprecation notice:** Due to the limitations and issues we found with ice4j we switched to the Pion library which is more actively maintained and its focus goes beyond a plain Jitsi support library.
+
+The new repository is here: https://github.com/FAForever/faf-pioneer
+
 # kotlin-ice-adapter
 
 A structural rewrite of the [java-ice-adapter](https://github.com/FAForever/java-ice-adapter) in Kotlin (on the JVM). It still follows the same