SLING-7167 Adjust READMEs

add uniform header linking to Sling project

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1810949 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/README.md b/README.md
index 999dedc..11596c1 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
-# Sling Http Testing Rules
+# Apache Sling Testing Rules
+
+This module is part of the [Apache Sling](https://sling.apache.org) project.
+
 The Sling Http Testing Rules allow writing integration tests easily. They are primarily meant to be used for tests that use http against 
 a Sling instance and make use of the `org.apache.sling.testing.clients` which offer a simple, immutable and extendable way of working 
 with specialized http clients.