SLING-7167 Adjust READMEs

add uniform header linking to Sling project

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1810894 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/README.md b/README.md
index eb188cd..9ae96a7 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
-EhCache Implementation of the CacheManagerService.
+# Apache Sling Cache API EhCache implementation
+
+This module is part of the [Apache Sling](https://sling.apache.org) project.
 
 This bundle contains an implementation of the CacheManagerService based on EhCache.
 
@@ -6,4 +8,4 @@
 
 This code was based on a module from Sparse Content Map 29 September 2012 (git:sha1:a222df1937434ad3f07bf6c4f60b19524a158bcb), which itself was based on a snapshot of a 
 module in Sakai Nakamura 27 Jan 2011 (git:sha1:b9d8e65b733ec7c35a3d194c9a5dc12acf13cb34). All know contributors to code in this module have been
-contacted for permission to grant license to the Apache Foundation.
\ No newline at end of file
+contacted for permission to grant license to the Apache Foundation.