Update jdt.ui's main README

Update links, remove obsolete sections and use simpler markdown style.

Author: HannesWell

README.md

@@ -1,68 +1,45 @@
-Contributing to JDT UI - Java development tools UI
-============================================
-
-Thanks for your interest in this project.
-
-Project description:
---------------------
+# JDT UI - Java development tools UI
 
 The JDT UI implements the user interface for the Java IDE. This includes views like Package Explorer and JUnit, the Java and properties files editors, Java search, and refactorings.
-Website: <http://www.eclipse.org/jdt/ui/>
 
-- <https://projects.eclipse.org/projects/eclipse.jdt.ui>
+For more information and important links, refer to the [JDT UI website](https://eclipse.dev/jdt/ui/) or the [JDT project overview page](https://projects.eclipse.org/projects/eclipse.jdt).
+
+## Contributing
 
-How to contribute:
---------------------
 Contributions to JDT UI are most welcome. There are many ways to contribute, 
 from entering high quality bug reports, to contributing code or documentation changes. 
-For a complete guide, see the [How to Contribute] [1] page on the team wiki.
+For a complete guide, see the [How to Contribute](https://wiki.eclipse.org/JDT_UI/How_to_Contribute) page on the team wiki.
 
-Developer resources:
---------------------
+## Developer resources
 
 Information regarding source code management, builds, coding standards, and more.
 
-- <https://projects.eclipse.org/projects/eclipse.jdt.ui/developer>
-
-Contributor License Agreement:
-------------------------------
+- https://eclipse.dev/jdt/ui/index.php#dev
 
-Before your contribution can be accepted by the project, you need to create and electronically sign the Eclipse Foundation Contributor License Agreement (CLA).
+## Contributor License Agreement
 
-- <http://www.eclipse.org/legal/CLA.php>
+Before your contribution can be accepted by the project, you need to create and electronically sign the Eclipse Foundation Contributor License Agreement (ECA).
 
-Forum:
-------
+- https://www.eclipse.org/legal/eca/
 
-Public forum for Eclipse JDT users.
-
-- <http://www.eclipse.org/forums/eclipse.tools.jdt>
-
-Search for bugs/issues:
-----------------
+## Search for bugs/issues
 
 This project uses Github issues to track ongoing development and issues.
 
-- [https://github.com/eclipse-jdt/eclipse.jdt.ui/issues](https://github.com/eclipse-jdt/eclipse.jdt.ui/issues)
+- https://github.com/eclipse-jdt/eclipse.jdt.ui/issues
 
-Create a new bug/issue:
------------------
+## Create a new bug/issue:
 
 Be sure to search for existing issue before you create another one. Remember that contributions are always welcome!
 
-- [https://github.com/eclipse-jdt/eclipse.jdt.ui/issues](https://github.com/eclipse-jdt/eclipse.jdt.ui/issues)
+- https://github.com/eclipse-jdt/eclipse.jdt.ui/issues
 
-Contact:
---------
+## Contact
 
 Contact the project developers via the project's "dev" list.
 
-- <https://dev.eclipse.org/mailman/listinfo/jdt-dev>
-
-License
--------
+- https://accounts.eclipse.org/mailing-list/jdt-dev
 
-[Eclipse Public License (EPL) v2.0][2]
+## License
 
-[1]: https://wiki.eclipse.org/JDT_UI/How_to_Contribute
-[2]: http://wiki.eclipse.org/EPL
+[Eclipse Public License (EPL) v2.0](https://www.eclipse.org/legal/epl-2.0/)