Add more links to gradle.md and CONTRIBUTING.md

FSchumacher · FSchumacher · commit 4e4fb9ab56b9 · 2019-10-26T13:44:17.000+02:00
diff --git a/README.md b/README.md
@@ -177,6 +177,8 @@ does not have a suitable GUI display.
 ## Developer information
 
 Building and contributing is explained in details at [building JMeter](https://jmeter.apache.org/building.html)
+and [CONTRIBUTING.md](CONTRIBUTING.md). More information on the tasks available for
+building JMeter with Gradle is available in [gradle.md](gradle.md).
 
 The code is maintained at GitHub:
 
