Add YourKit message to readme

README.md

@@ -74,3 +74,13 @@ Links
 * [Issue tracker](https://github.com/EngineHub/WorldEdit/issues)
 * [Continuous integration](https://builds.enginehub.org) [![Build Status](https://ci.enginehub.org/app/rest/builds/buildType:bt10,branch:master/statusIcon.svg)](https://ci.enginehub.org/viewType.html?buildTypeId=bt10&guest=1)
 * [End-user documentation](https://worldedit.enginehub.org/en/latest/)
+
+Supporters
+----------
+
+[![YourKit Logo](https://www.yourkit.com/images/yklogo.png)](https://www.yourkit.com/)
+
+YourKit supports open source projects with innovative and intelligent tools for monitoring and profiling Java and .NET applications.
+YourKit is the creator of [YourKit Java Profiler](https://www.yourkit.com/java/profiler/),
+[YourKit .NET Profiler](https://www.yourkit.com/.net/profiler/),
+and [YourKit YouMonitor](https://www.yourkit.com/youmonitor/).