no longer maintained message

Author: Cylix

README.md

@@ -1,3 +1,13 @@
+# Important
+
+Please be advised that this library **is no longer maintained**.
+
+I have maintained this library for over 3 years, but I do not have enough time to provide a reliable support and continuous development for any longer.
+
+Any existing or new issues will **not** be treated and I do not guarantee to merge any new pull request.
+
+If anyone is willing to take over this project, feel free to fork this project and message me to add a link to your fork in this README.
+
 <p align="center">
    <img src="https://raw.githubusercontent.com/Cylix/cpp_redis/master/assets/images/cpp_redis_logo.jpg"/>
 </p>