Update README.md

Author: vlabatut

README.md

@@ -12,6 +12,8 @@ Nerwip is free software: you can redistribute it and/or modify it under the term
 * Lab site: http://bit.gsu.edu.tr/compnet
 * GitHub repo: https://github.com/CompNet/nerwip
 * Contact: vlabatut@gsu.edu.tr
+ 
+**This is not a production version: please use the latest release.**
 
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