Mention zally maven plugin and remove the Roadmap

README.md

@@ -53,28 +53,17 @@ Please consult the following documents for more information:
 - [How to develop new Rules](documentation/rule-development.md)
 - [Building Under Windows Subsystem for Linux](documentation/build-under-wsl.md)
 
+## Integrations
+
+- [Zally Maven Plugin](https://github.com/ethlo/zally-maven-plugin) (unofficial)
+
 ## Contributing
 
 Zally welcomes contributions from the open source community. To get started, take a
 look at our [contributing guidelines](CONTRIBUTING). Then check our
 [Project Board](https://github.com/zalando/zally/projects/1) and
 [Issues Tracker](https://github.com/zalando/zally/issues) for ideas.
 
-## Roadmap
-
-For Zally [version 1.5](https://github.com/zalando/zally/milestone/3), we're focusing on:
-
-- Improve extensibility of Zally
-  - Plugin mechanism for Rules (Sets)
-  - Utilities and helper functions for Check development
-- Improve quality by introducing a better testing approach for integration tests
-- Make the usage of Zally easier by providing high-quality documentation for
-  - End users
-  - Check developers
-  - Operators and administrators
-
-If you have ideas for these items, please let us know.
-
 ## Contact
 
 Feel free to join our [Gitter room](https://gitter.im/zalando/zally) or contact one