Updated readme notice.

Author: Rolf-Smit

README.md

@@ -1,7 +1,7 @@
 # Android-Retainable-Tasks
 [ ![Download](https://api.bintray.com/packages/rolf-smit/maven/android-retainable-tasks/images/download.svg) ](https://bintray.com/rolf-smit/maven/android-retainable-tasks/_latestVersion)
 
-*This library is currently in a development phase which may, in the future, cause the existing API portrayed in this document to change.*
+*Version 0.2.0 has quite some changes compared to version 0.1.0, so please read this document very carefully.*
 
 Android-Retainable-Tasks is an easy to use mini-library for easy asynchronous background tasking with callback support to the UI. This library is based on the Android `AsyncTask` implementation but with support for retaining tasks and therefore surviving configuration changes (orientation).